The systems behind Sustineer — and what comes next.

No key

Free: BSD-licensed library; no API quota because it is self-hosted in the app.

Paid: None required; tile/data providers are separate.

Limits: Browser/WebGL limits; external data providers set their own quotas.

Rights: Commercial use permitted under the library licence.

Keep one consistent map shell rather than provider-specific map UIs.

No key

Free: Public map service with no API key; OpenStreetMap/OpenMapTiles attribution required.

Paid: No standard paid tier published; self-hosting is possible.

Limits: Public service/fair-use rather than a contractual SLA.

Rights: Check attribution and tile-service terms before high-volume commercial use.

Current Sustineer basemap.

No key

Free: Full library under Apache 2.0.

Paid: None.

Limits: No hosted API quota.

Rights: Commercial use permitted under Apache 2.0.

Preferred for custom Sustineer charts.

Deployment token

Free: 100,000 Worker requests/day; 10 ms CPU/request; static assets are free.

Paid: Workers Paid starts at $5/month; includes 10M requests/month and 30M CPU-ms.

Limits: Free: 50 external subrequests/request and daily request/CPU limits.

Rights: Commercial use allowed.

Already serving sustineer.com; deployment credentials must never be app runtime secrets.

GitHub authorization

Free: Public repository hosting and core Git features.

Paid: Paid GitHub plans add private-org/team/enterprise features; not needed for current public repo.

Limits: Service/API limits depend on authentication and feature.

Rights: Commercial use allowed.

Repository source of truth.

Site key + secret

Free: Up to 20 widgets, unlimited challenges, up to 10 hostnames/widget, 7-day analytics.

Paid: Enterprise: custom pricing; more hostnames, analytics and enterprise controls.

Limits: Free limits widget count/hostnames, not challenge volume.

Rights: Free plan is suitable for most production applications.

Recommended next infrastructure addition.

Project URL + publishable/secret keys

Free: 2 active projects, 50k MAU, 500 MB database, 1 GB storage and limited egress.

Paid: Pro starts at $25/month with larger quotas, backups and production features.

Limits: Free projects may pause after inactivity; quotas apply.

Rights: Commercial use allowed.

Do not add until accounts/saved actions/community truly need persistence.

Project credentials if enabled

Free: Free developer/project tier with usage limits; suitable for testing/small content sites.

Paid: Growth/enterprise tiers vary with usage; verify current pricing before adoption.

Limits: Usage and seats depend on plan.

Rights: Commercial use allowed.

Version-controlled content is simpler for v1.

No key when self-hosted

Free: MIT-licensed self-hosted library.

Paid: None required.

Limits: More analyst-oriented and heavier than the desired consumer UI.

Rights: Commercial use permitted under MIT.

Use internally, not as Sustineer's main consumer map.

Google Cloud project/account

Free: Community non-commercial tier includes 150 EECU-hours/month; higher non-commercial tiers exist.

Paid: Commercial Earth Engine uses Google Cloud paid terms; pricing depends on compute/use.

Limits: Non-commercial eligibility and compute quotas.

Rights: Free non-commercial access is not a safe dependency for a future commercial Sustineer.

Prefer NASA/Copernicus/GFW pre-rendered layers or cached data.

No key for public data

Free: Global country-level statistical datasets and downloads.

Paid: None.

Limits: Mostly annual/slow-changing; do not query upstream on every page view.

Rights: Reuse subject to FAO dataset/licensing/attribution terms.

Move from editorial/source hooks to periodic cached ingestion.

No key for reads

Free: Read API and bulk data; identify the app with a proper User-Agent.

Paid: None.

Limits: Current docs: about 15 product reads/min/IP and 10 searches/min/IP; do not use search as autocomplete.

Rights: Database is ODbL; contents/images have their own licences and attribution/share-alike obligations.

Cache barcode results; show missing/crowdsourced status clearly.

No key for core open layers

Free: Global modelled soil layers, generally CC BY 4.0.

Paid: None.

Limits: REST API is currently paused; use supported WMS/WCS/download channels.

Rights: Commercial reuse allowed with required attribution under applicable licence.

Never collapse modelled properties into an invented 'soil health score'.

No key

Free: Explorer supporting data, spreadsheets and map layers are made freely available with attribution.

Paid: None for the Explorer data.

Limits: Broader site content remains copyrighted; reuse the explicitly downloadable/supporting data rather than copying full articles.

Rights: Use specific Explorer resources with attribution and respect broader site terms.

Excellent backbone for Actions/Learn if kept practical and not treated as a ranking oracle.

No key for downloads

Free: Bulk database downloads; more than a million mapped edible locations.

Paid: No public commercial tier; contact Falling Fruit for commercial permission.

Limits: Default dataset licence is generally CC BY-NC-SA and source-specific licences vary.

Rights: Commercial use requires permission unless a source-specific dataset permits it.

Very on-brand, but clear commercial licensing first.

Current site shows simple endpoint/contact flow

Free: Website demonstrates global point queries; no stable public free quota is documented.

Paid: Pay-as-you-grow/contact sales; no public entry price found.

Limits: Pricing, methodology and production terms need direct verification.

Rights: Potentially commercial but terms must be confirmed.

Interesting convenience layer, but prefer authoritative underlying sources until terms mature.

No key

Free: Downloadable research files.

Paid: None.

Limits: Static/research-oriented; check record licence and methods before public simplification.

Rights: Depends on the specific Zenodo record licence.

Useful for deeper Learn/Planet context, not a daily feature.

No key

Free: Public PV calculations; no registration; JSON/CSV outputs.

Paid: None.

Limits: 30 calls/sec/IP; browser AJAX/CORS is not supported, so Sustineer proxies it server-side.

Rights: Public EU service; retain source/method context.

One of Sustineer's highest-value action tools.

No key for downloads

Free: Downloadable electricity datasets and data explorer.

Paid: None relevant.

Limits: Slow-changing datasets should be periodically ingested/cached.

Rights: Follow the licence supplied with the current dataset/release.

Core source for simple renewable-energy trends.

No key

Free: Embeddable interactive charts and downloadable chart data.

Paid: None.

Limits: Third-party datasets retain their upstream licences even when visualized by OWID.

Rights: OWID-produced content is broadly reusable with attribution; always check upstream-source licences.

Default source for high-quality historical context when rebuilding a chart adds little value.

No conventional API key

Free: Worldwide renewable-project trackers and downloads.

Paid: None relevant.

Limits: Release cadence is periodic rather than live; check current tracker-specific licence.

Rights: Follow GEM attribution/licence requirements for each tracker.

Strong optimistic 'renewables being built' experience.

No key for public atlas/downloads

Free: Public solar-resource atlas and country/GIS downloads.

Paid: No standard premium API tier identified.

Limits: Modelled climatology, not live roof measurements; API/embedding rights should be checked before high-volume reuse.

Rights: Use according to World Bank/ESMAP and dataset attribution terms.

Useful global companion to PVGIS.

Depends on download/API route

Free: Public atlas and downloadable datasets with attribution.

Paid: No standard premium tier published.

Limits: Modelled long-term wind resource; terms apply to DTU-owned data.

Rights: Check current DTU/World Bank terms and preserve attribution.

Useful for off-grid/self-sufficient home learning.

Manual security-token approval

Free: Platform/API access after account + token request.

Paid: None.

Limits: Regional (European system); stable public numeric API quota is not prominently published, so cache/batch.

Rights: Use subject to ENTSO-E terms and attribution.

Add when location-specific live energy becomes a stronger product feature.

No key

Free: National/regional data and forecasts under CC BY 4.0.

Paid: None.

Limits: Great Britain only.

Rights: Commercial reuse allowed with attribution under CC BY 4.0.

Excellent UX model for 'greener hours to use electricity'.

Free API key

Free: Official U.S. energy API and downloads.

Paid: None.

Limits: Regional to the U.S.; response-size and fair-use limits apply.

Rights: U.S. government/open-data terms.

Add as regional depth rather than global core.

API key

Free: 14-day API trial; not a permanent general production tier.

Paid: Cheapest standard signals are about €4,500/year; electricity mix/carbon intensity are about €6,000/year per standard signal/coverage.

Limits: Pricing scales by signal/coverage/history/forecast requirements.

Rights: Commercial API use requires a paid licence.

Too expensive for Sustineer now; use open regional/grid data instead.

Account/token

Free: Basic: all endpoints for CAISO_NORTH plus CO2 percentile signal for all regions.

Paid: Analyst/Pro pricing is custom ('Let's talk').

Limits: Useful global raw signals require paid access; forecasts update frequently.

Rights: Commercial terms depend on paid plan/agreement.

Interesting for smart-load timing, but not a launch dependency.

No conventional key

Free: NASA public solar/meteorology APIs.

Paid: None.

Limits: Excessive requests can be throttled (429); cache model/climatology outputs.

Rights: NASA public-data terms; retain citation.

Useful depth if PVGIS/Open-Meteo are insufficient.

No key

Free: Downloadable dataset.

Paid: None.

Limits: Legacy/static dataset; freshness is weaker than newer trackers.

Rights: Follow WRI dataset licence/attribution.

Prefer Global Energy Monitor for current renewable-buildout stories.

Account/key

Free: Limited developer access is available.

Paid: Full/commercial pricing is not clearly public.

Limits: India-specific; current licence/access must be checked.

Rights: Check current API licence before production use.

Regional depth if Indian users justify it.

No key for current open datasets

Free: Public structured electricity-system datasets and API access.

Paid: None for the open Data Service.

Limits: Sweden-specific; dataset catalogue is still expanding and gradually replacing older Mimer services.

Rights: Use under the licence/attribution attached to each dataset.

Excellent regional depth for Sweden, but Sustineer remains worldwide.

No key

Free: Public OSM data and community Overpass instances.

Paid: Commercial hosted Overpass/OSM providers exist separately; self-hosting is possible.

Limits: Public instances require bounded/respectful queries and are not unlimited production infrastructure.

Rights: OSM data is ODbL; attribution and database obligations apply.

Current Sustineer queries are geographically bounded and cached.

Varies by export/API route

Free: Public participation/map/open-source components.

Paid: No mainstream paid tier identified.

Limits: API/export maturity and licence details should be checked before production ingestion.

Rights: Check current open-data/software licence for the exact integration.

Strong Circular Living/Community fit once core experience is stable.

No standard key identified

Free: Community/open-source project resources.

Paid: None identified.

Limits: Use official datasets/exports only where reuse terms are clear.

Rights: Check dataset/content licences separately from source code.

Good participation feature; not necessary for launch.

API/account may be required

Free: Public site/data for permitted non-commercial use.

Paid: No public commercial licence/pricing.

Limits: Website terms restrict copying/framing and commercial use; data commonly carries CC BY-NC.

Rights: Not suitable as a normal commercial dependency without written permission.

Keep as UX inspiration/possible partnership target.

No key for public reads

Free: Public APIs and occurrence/map services.

Paid: None.

Limits: Large downloads use GBIF workflows; individual datasets have their own licences.

Rights: Preserve dataset/record-level licensing and attribution.

Observation density must not be presented as abundance or ecological trend.

No key for many reads; auth for writes

Free: Public read endpoints; community observations/projects.

Paid: None.

Limits: iNaturalist asks clients to stay around 60 req/min and throttles at roughly 100 req/min; media licences vary.

Rights: Observation/photo licences vary; do not assume all images permit commercial reuse.

Sustineer currently links/reads rather than bulk-republishing media.

Some endpoints/layers use free token/account

Free: Many public datasets/layers and map tooling.

Paid: No single paid tier; licensing is layer-specific.

Limits: Each layer has its own freshness/licence; do not assume blanket commercial rights.

Rights: Check licence for every selected layer.

Use one focused forest-change experience, not the entire portal.

Free personal API key / request

Free: Public API access after obtaining a key.

Paid: No public commercial API tier.

Limits: Use limits and endpoint caps apply; photos/audio are separate from API data.

Rights: Commercial use requires prior written permission from Cornell/eBird.

Very engaging, but iNaturalist + GBIF cover launch biodiversity.

Account/study access varies

Free: Many public studies and tools; access varies by study.

Paid: None generally; no universal commercial licence.

Limits: Every study/data owner controls access/licensing; live and historic availability varies.

Rights: Study-level licences may be CC0, CC BY, CC BY-NC or restricted.

High-delight 'follow an animal' stories after core nature features.

No stable public API promised

Free: Browse/link to public restoration projects.

Paid: Partnership/API pricing not publicly listed.

Limits: Do not reverse-engineer private backend endpoints or republish proprietary project data.

Rights: Deep-linking is safest until explicit API/partner permission exists.

Strong Community/Join fit; contact Restor for formal access.

Free token for eligible non-commercial use

Free: API for conservation/education/research non-commercial uses.

Paid: Commercial access requires an IBAT/data licence; public API pricing is not offered.

Limits: Rate limiting and mission-alignment restrictions; cache between Red List releases.

Rights: Commercial use of the Red List API is strictly forbidden.

Use GBIF/iNaturalist and external IUCN links unless licensing changes.

Unknown/depends on campaign

Free: Citizen-science campaigns and public platform.

Paid: No standard paid tier identified.

Limits: API/embedding rights need current confirmation.

Rights: Check campaign/data licences before reuse.

Potential Join activity rather than a core data dependency.

Open APIs require developer-portal subscription; special legacy Artportalen API needs approval

Free: Recommended multi-dataset Species Observation System API is open and does not require special approval.

Paid: No standard paid tier.

Limits: Sweden-specific; special Artportalen-only functionality is restricted and approval-based.

Rights: Follow SLU's API/data terms and record-level licensing/attribution.

Use only as Sweden-specific enhancement because GBIF/iNaturalist already cover global nature.

Current API/access terms should be verified before implementation

Free: Public listening/browsing and community-contributed recordings.

Paid: No standard premium tier.

Limits: Recording licences vary by contributor; API version/access terms can change and were not sufficiently verified for production in this review.

Rights: Do not republish audio unless the individual recording licence permits it.

High-delight biodiversity enhancement, but rights handling makes it a later optional feature.

Registration may be required for downloads

Free: Global water-risk datasets/maps with attribution.

Paid: None.

Limits: Risk/stress is not drinking-water safety; data is modelled/indicator-based.

Rights: Current data is generally available under WRI attribution/licence terms; verify dataset version.

Best global beginner-friendly water context.

No API key for open Zenodo subset

Free: Open CC BY 4.0-equivalent subset is published annually on Zenodo.

Paid: No standard paid tier; custom requests may be free for eligible non-commercial users.

Limits: Portal is not a friendly high-volume production REST API; provider-level data policies vary.

Rights: Use openly licensed subset and preserve data-provider attribution.

Ingest annual snapshot rather than scrape the portal.

No key for core API

Free: Public marine biodiversity APIs/downloads.

Paid: None.

Limits: Contributing datasets have varying licences and observation dates.

Rights: Preserve dataset-level licence/provenance; some records may be non-commercial.

Add once oceans become a stronger Sustineer theme.

Free Copernicus account

Free: Free account provides access to a large catalogue of marine products.

Paid: None for standard public Copernicus Marine access.

Limits: Large/technical gridded datasets need server-side preprocessing for consumer UX.

Rights: Copernicus data is broadly reusable under its licence/attribution rules.

Powerful but not aligned with current Grow/Home/Circular launch focus.

No conventional key

Free: Global near-real-time reef monitoring products.

Paid: None.

Limits: Specialized to coral/tropical marine systems.

Rights: NOAA/public-data attribution/citation expectations apply.

Strong future marine-health story, not launch priority.

No key for basic access

Free: U.S. federal real-time/historical water services.

Paid: None.

Limits: United States only; use for regional depth.

Rights: U.S. government public-data rules.

Add only if regional water monitoring becomes important.

Free token for non-commercial use

Free: Up to 50,000 API requests/day and 1.5M/month for non-commercial use.

Paid: No general-public commercial price; mission-aligned custom licences may be possible.

Limits: Token/account required for many APIs; non-commercial licence.

Rights: Standard API terms are CC BY-NC / non-commercial only.

Excellent visual inspiration, unsafe as a normal commercial dependency.

API key

Free: €0: 10 requests/day, all weather parameters, no support, non-commercial only.

Paid: Small €19/month: 500 requests/day but still no support; Medium €49/month adds commercial use/support and 5,000/day.

Limits: Free is too small and non-commercial; paid usage caps remain.

Rights: Commercial use begins on the Medium plan per current pricing page.

Open-Meteo/Copernicus cover most needs more economically.

API key

Free: 50 one-time credits.

Paid: Hobby $7.99/month for 500 requests/day; Starter $14.99/month for 1,000/day.

Limits: Free allocation is a one-time trial rather than a sustainable production tier.

Rights: Check plan terms before commercial production.

Not central enough to justify another paid dependency.

Account for platform/API use

Free: Many catalogue datasets are open/free; access and licences are dataset-specific.

Paid: No simple public premium tier confirmed.

Limits: Every dataset can carry different commercial/reuse conditions.

Rights: Check each source dataset's licence; do not assume platform-wide rights.

Useful catalogue if a specific ocean use case emerges.

No key

Free: NOAA buoy data feeds.

Paid: None.

Limits: Station coverage is uneven and more technical than consumer-ready APIs.

Rights: U.S. government public-data rules.

Potential coastal Explore feature.

No key

Free: Open datasets/software and assessment methods.

Paid: None.

Limits: Headline global assessment freshness must be verified before presenting as 'current'.

Rights: Follow underlying dataset licences.

Educational comparison, not a live metric.

Free API key

Free: Live AIS WebSocket access with key.

Paid: No standard paid tier highlighted.

Limits: Coverage/availability and terms can change; high-throughput real-time stream is operationally heavy.

Rights: Check current terms before public/commercial integration.

Interesting ship map, but far from Sustineer's core mission.

API key

Free: Limited trial/free access may be available.

Paid: Paid plans are offered; verify current dashboard price before purchase.

Limits: Real-time maritime data can become costly and high-volume.

Rights: Commercial use depends on paid terms.

No current Sustineer need.

Likely account/key depending on dataset

Free: Some catalogue/data access appears public.

Paid: No clear public premium pricing found.

Limits: Dataset-by-dataset coverage and terms.

Rights: Verify exact dataset/API terms.

Research lead, not a priority integration.

No API key when self-hosted

Free: Open modelling code; model/input datasets may have separate terms.

Paid: None for the library.

Limits: Requires preprocessing/model computation; not a simple hosted API.

Rights: Check model-input dataset licences.

High-delight Learn feature later.

No key on public API

Free: Public endpoint: roughly 600 requests/min, 5,000/hour and 10,000/day; no SLA; non-commercial hosted use.

Paid: Commercial hosted plans add higher monthly quotas and SLA options; verify current checkout pricing.

Limits: Hosted free endpoint is explicitly non-commercial; design provider to be replaceable if Sustineer monetizes.

Rights: Commercial hosted use requires a paid plan or another compliant deployment/source.

Currently used for weather/growing context.

API key

Free: 60 requests/min and 2,000/hour on current free plan.

Paid: Higher/commercial/custom access is not publicly priced; contact OpenAQ.

Limits: Station availability varies; measured observations are not complete global coverage.

Rights: Check current API terms/attribution for production use.

Production key is already configured in Sustineer.

No key for many data feeds

Free: Public community-sensor data.

Paid: None.

Limits: Sensor quality/coverage varies; avoid presenting as equivalent to regulatory monitoring.

Rights: Follow current open-data licence/attribution.

Great citizen-science layer after OpenAQ.

No key for public downloads; Beta API varies

Free: Downloadable country/sector/city/geospatial data; Beta API.

Paid: None standard.

Limits: API is explicitly Beta, availability not guaranteed, and heavy volume is discouraged.

Rights: Creative Commons/public terms with attribution; verify specific release.

Use scheduled/downloaded snapshots, never a hard live dependency.

Free CDS account/token

Free: Public climate datasets and API after account/token setup.

Paid: None for standard CDS access.

Limits: Large scientific datasets need server-side processing; not ideal for direct browser use.

Rights: Copernicus licence generally permits broad reuse with attribution.

Use for deeper climate/growing context, not homepage requests.

Usually no key

Free: Large library of global Earth imagery layers.

Paid: None.

Limits: Layer freshness/meaning varies; only add layers that support a clear user story.

Rights: NASA/public-data citation expectations apply.

Visually powerful, but intentionally deprioritized after Sustineer's lifestyle repositioning.

No key for basic API

Free: Public NASA event API.

Paid: None.

Limits: Hazards/disasters are outside Sustineer's current core focus.

Rights: NASA/public-data terms.

Keep as optional future 'Earth today' module, not launch.

Free MAP_KEY

Free: MAP_KEY API access; current allowance about 5,000 transactions per 10 minutes.

Paid: None.

Limits: Satellite detections are not ground-confirmed incidents.

Rights: NASA data is broadly reusable; cite the source.

Explicitly lower priority because Sustineer is not a wildfire/disaster site.

No key

Free: Country index covering about 185 countries and multiple indicators.

Paid: None.

Limits: Annual/index data rather than live conditions; explain methodology.

Rights: Use with attribution and current project terms.

Useful to balance mitigation with resilience/adaptation.

Free token

Free: Global station/AQI access with token.

Paid: No clear general commercial tier published.

Limits: Terms/attribution and non-commercial constraints make OpenAQ + Open-Meteo simpler.

Rights: Obtain permission/terms for commercial use.

Overlaps current sources; keep only as fallback.

No official API

Free: Public visualization.

Paid: None.

Limits: No official integration API; do not scrape/iframe without permission.

Rights: Underlying NOAA/Copernicus data have their own terms; site UI/code rights are separate.

Design inspiration only.

Usually no key for Open Data; some authorized services are charged

Free: SMHI Open Data APIs and metadata services for public environmental data.

Paid: Only specific services marked as authorized/charged; contact SMHI Customer Service for those.

Limits: Sweden-specific; every service has its own documentation and conditions.

Rights: Follow the licence/terms attached to the chosen open-data service.

Excellent Swedish environmental depth; Open-Meteo remains the global default.

Free API key

Free: Free account/API key with dashboard-managed quotas.

Paid: Hosted collaborative/commercial arrangements and self-hosting options; current pricing depends on plan/use.

Limits: Quota varies by endpoint/account; cache and avoid unnecessary route calls.

Rights: Review hosted-service terms for production scale; open-source engine can be self-hosted.

Production key is already configured in Sustineer.

API/login workflow

Free: Feed discovery metadata and access to publisher feed URLs.

Paid: No standard paid tier.

Limits: Every underlying feed has its own licence, coverage and freshness.

Rights: Track publisher-level rights; catalogue access does not override feed licences.

Best way to discover local transit/bike feeds without hardcoding cities.

Usually no key; provider-specific

Free: GBFS specification and many public mobility feeds.

Paid: No central paid tier; each operator controls its feed.

Limits: Availability/licence varies city by city.

Rights: Respect each operator/feed licence and attribution.

Good Explore layer once transport becomes more important.

Free API key

Free: API access for appropriate use; user-contributed data is CC BY 4.0.

Paid: No standard premium tier.

Limits: Imported data can carry provider-specific licences; production terms/quotas should be rechecked.

Rights: Visible data-provider attribution is required; verify production/commercial use before launch.

Env var is already reserved but feature is hidden.

No vendor key when self-hosted

Free: Self-hosted software.

Paid: No required SaaS tier; hosting/ops costs depend on deployment.

Limits: Operating global routing means ingesting/maintaining street + transit feeds.

Rights: Verify current repository licence and all feed/data licences.

Too operationally heavy until Sustineer proves demand.

Free API key

Free: Bronze-level keys are free; realtime APIs commonly allow 25 calls/min and 100,000 calls/month, with higher free key levels available by request/use case.

Paid: No standard paid premium tier; higher Silver/Gold limits are granted through Trafiklab's key-level process.

Limits: Sweden-specific; bulk analytics should use GTFS/GTFS-RT rather than hammering realtime endpoints.

Rights: Use subject to Trafiklab and each dataset/provider licence.

Useful if Sustineer later adds strong Sweden-specific transport experiences.

Free registered account/API access

Free: Companies and individuals can register and use real-time road/rail traffic data.

Paid: None.

Limits: Traffic volume is monitored and published usage limits must be respected.

Rights: API registration accepts a licence; core traffic information is published under open terms including CC0 on the registration page.

Regional Swedish extension rather than worldwide core.

Recommended free API key

Free: Free key provides $1/day API budget; enough for about 1,000 searches or 10,000 list/filter calls/day.

Paid: Pay-as-you-go can be topped up in $1 increments; annual Member plan starts at $5,000/year.

Limits: Content/PDF downloads cost more; free budget resets daily.

Rights: OpenAlex metadata/data is open, but linked full-text content has separate rights.

Env var already reserved; use as optional 'Go deeper' research.

Google API key

Free: Default quota is typically 10,000 units/day; official embeds do not require rebuilding video hosting.

Paid: No normal pay-per-request tier; request additional quota through Google audit/process.

Limits: Search calls are quota-expensive; embed/video rights remain with creators/YouTube.

Rights: Use official player/API and comply with YouTube API Services Terms.

Env var reserved; curated lists are preferable to uncontrolled search feeds.

Manual API key request

Free: Project/organization API for eligible non-commercial use with attribution/caching.

Paid: Commercial/API arrangements are custom; donation processing has separate percentage fees.

Limits: Cache data, respect API code of conduct; do not process donations directly unless separately approved.

Rights: Current standard API terms are non-commercial; contact GlobalGiving before monetized use.

Env var reserved; request has already been prepared.

Depends on project/API use

Free: Public citizen-science projects; Panoptes backend is open source.

Paid: No normal paid API tier.

Limits: Project imagery/data rights are separate from platform source code.

Rights: Deep-linking is safest; republishing project media requires permission/licence review.

One of the strongest future Join experiences.

No key for single-domain endpoint

Free: Single-domain green-hosting checks without a key.

Paid: No standard premium tier identified.

Limits: Cache results; coverage depends on Green Web Foundation evidence/provider data.

Rights: Follow attribution/terms.

Tiny, memorable digital-sustainability feature.

No key for library

Free: Apache-2.0 library.

Paid: None.

Limits: Outputs are estimates dependent on electricity-intensity assumptions, not measurements.

Rights: Library is commercial-friendly; bundled/reference datasets carry separate attribution/share-alike terms.

Useful Learn/Actions micro-tool if clearly labelled as approximate.

No API key for public simulator

Free: Public interactive learning experience.

Paid: Training/facilitation offerings exist separately; not needed for linking.

Limits: Embedding/repackaging rights should be confirmed before iframe integration.

Rights: Link to official simulator unless explicit embed/reuse permission is established.

Excellent slider→outcome UX pattern.

No key for current public endpoint

Free: Simple GET endpoint for public IPv4/IPv6 addresses using Ember-derived annual grid-intensity data.

Paid: None.

Limits: Annual country-level averages, not live electricity intensity; unknown IPs fall back to a world average.

Rights: Green Web Foundation tools are intended for open reuse with attribution; verify specific API terms for production.

Small educational digital-sustainability feature; never present it as live grid data.

Free Green Web Foundation API key

Free: Public API access after registering for a Green Web Foundation key.

Paid: No paid tier announced; current access is explicitly free 'for the moment'.

Limits: Young/emerging standard; useful coverage depends on organizations publishing carbon.txt files.

Rights: Follow Green Web Foundation API/open-source terms and source disclosures.

Interesting future 'show me an organization's sustainability disclosure' learning tool.

No key

Free: Public educational experience.

Paid: None.

Limits: No stable public API identified; do not copy proprietary tool content wholesale.

Rights: Link/reference unless permission for reuse is clear.

Useful design pattern for plain-language explanations.

No API key required for linking

Free: Many public/free courses.

Paid: None for normal learner access.

Limits: No universal course API assumed; link/embed only where explicitly permitted.

Rights: Do not republish course content; link to official course pages.

Good curated Learn resource without building a course catalogue.

No key for links/allowed embeds

Free: Public courses/resources.

Paid: None generally for course access.

Limits: Embedding/republication depends on course/content terms.

Rights: Link or use official embeds only.

Curate a small selection rather than build a giant catalogue.

No key for public resources

Free: NASA training materials and webinars.

Paid: None.

Limits: More technical than Sustineer's beginner target.

Rights: Link/cite NASA resources; follow media/content terms.

Useful 'go deeper' resource, not core.

Instance-specific

Free: Open-source platform/software; public course access depends on provider.

Paid: Hosted Open edX providers have separate pricing.

Limits: Not useful as a universal discovery API by itself.

Rights: Depends on instance/course provider.

Prefer hand-curated UN CC:Learn/SDG Academy/YouTube links.

No API key when self-hosted; hosted H5P.com account otherwise

Free: H5P open technology can be self-hosted; H5P.com offers a free trial rather than a permanent hosted free plan.

Paid: H5P.com Pro currently starts around $1,560/year (~$130/month equivalent) for 3 authors on the pricing calculator.

Limits: Hosted pricing is designed for teams/LMSs and is expensive for a small site; self-hosting adds integration/licence work.

Rights: Review H5P component/code licences and content licences; hosted use follows H5P.com terms.

Consider only if Sustineer's Learn section needs richer authored interactions than custom React components.

API key

Free: New accounts can test Search/Estimate with up to 250 API calls/month; Starter/data access is non-commercial.

Paid: Data Pro is €400/month or €3,500/year; commercial software/API use is Enterprise/custom and API pricing depends on data access + call volume.

Limits: Free is evaluation-only/non-commercial; commercial API terms are materially more expensive than Sustineer currently needs.

Rights: A commercial licence/Enterprise arrangement is required for software products generating commercial benefit.

Avoid for now because Sustineer intentionally does not center personal carbon-impact accounting.

No key for linking

Free: Public resource discovery; external materials can be used for educational purposes with provider attribution.

Paid: No standard paid integration tier identified.

Limits: Not a general public API; individual external resources have their own rights/embedding rules.

Rights: Link to original resources and respect each content provider's terms.

Useful as a curated Learn source, but UN CC:Learn/SDG Academy fit Sustineer's general audience more directly.

API key + form/tag IDs

Free: Up to 10,000 subscribers, unlimited broadcasts, unlimited forms/landing pages, tagging/segmentation and API access.

Paid: Creator starts around $33/month at 1,000 subscribers and adds sequences/visual automations.

Limits: Free plan lacks the paid automation/sequences feature set.

Rights: Commercial newsletter use allowed under plan terms.

Current Sustineer email provider; production key/form/tags are configured.

API key

Free: 300 email sends/day, up to 100,000 stored contacts, campaigns + transactional email, automation up to 2,000 contacts.

Paid: Starter from $9/month; removes daily cap and starts at 5,000 monthly sends.

Limits: Free sends reset daily and do not roll over.

Rights: Commercial use allowed under plan terms.

Preferred over adding Resend if Sustineer wants one broader transactional/CRM service.

API key

Free: 3,000 emails/month, 100/day, 3 domains, 30-day log retention.

Paid: Pro $20/month for 50,000 emails/month, no daily limit and more domains.

Limits: Primarily transactional email, less useful than Brevo if CRM/marketing breadth matters.

Rights: Commercial use allowed under plan terms.

Skip unless its developer experience becomes more valuable than Brevo's broader feature set.

API access included; advanced/write features depend on plan

Free: Launch: up to 2,500 subscribers, unlimited email sends, up to 3 publications, API access excluding Send API.

Paid: Scale starts around $49/month monthly (or about $43/month equivalent on annual at the smallest tier) and adds automations, webhooks, community and monetization.

Limits: Free list is much smaller than Kit's 10k free subscriber allowance.

Rights: Commercial newsletter use allowed under plan terms.

Good alternative, but no reason to replace Kit now.

API key if used

Free: Up to 2,500 contacts and 10,000 emails/month; 3 automations; 1 form and 1 landing page; 30-day reports.

Paid: Pro pricing scales with contacts/sends; verify current calculator for exact entry price.

Limits: Free includes EmailOctopus branding and one user; limited fields/tags/automation steps.

Rights: Commercial use allowed under plan terms.

Good budget alternative but Kit is already integrated and offers a larger free audience.

API key if used

Free: 250 active subscribers, 2,500 emails/month, 3 automations/forms, 1 website/landing page.

Paid: Comfort starts at $12/month and expands templates, automations, forms/sites and sending limits.

Limits: Free subscriber allowance dropped substantially in June 2026.

Rights: Commercial use allowed under plan terms.

Inferior free fit to Kit for Sustineer's expected list growth.