MPPquality 0.78

Fund permanent carbon removal via Stripe Climate with per-call USDC payments.

Price
per_call
Protocol
mpp
Verified
no
Endpoint
https://climate.stripe.dev/api/contribute

What it does

Stripe Climate's contribution endpoint lets AI agents programmatically fund permanent carbon removal projects. You send a POST request with a JSON body specifying an amount in USDC cents (1–10000, i.e. $0.01–$100.00), and the endpoint returns a unique contribution ID along with a human-readable impact description (e.g. "This contribution funds ~2.67kg of permanent carbon removal"). Payment is handled via MPP (USDC on Tempo, eip155:42431) or x402 (USDC on Base, eip155:8453).

The flow follows standard MPP/x402 challenge-response: an initial POST returns 402 Payment Required with a WWW-Authenticate: Payment header containing a JWT challenge. The caller then retries with an Authorization: Payment proof=… header to complete the transaction. Stripe contributes 100% of funds toward carbon removal projects, minus third-party fees. Contributions are not tax deductible as Stripe is not a registered charity.

The endpoint accepts only POST requests (HEAD and GET return 405). The amount field must be an integer between 1 and 10000 cents. The OpenAPI spec documents a pricing range of $0.01–$100.00 per call, corresponding directly to the contribution amount chosen by the caller.

Capabilities

carbon-removal-contributionmpp-paymentx402-paymentusdc-settlementstripe-climatepost-onlyjson-apiper-call-pricing

Use cases

  • —AI agents autonomously offsetting carbon footprint of compute workloads
  • —Embedding carbon removal contributions into automated workflows or pipelines
  • —Programmatic micro-donations to permanent carbon removal projects
  • —Building climate-positive agent behaviors that contribute on each task completion
  • —Integrating carbon removal into e-commerce or SaaS checkout flows via agents

Fit

Best for

  • —AI agents that want to programmatically fund carbon removal
  • —Developers building climate-aware autonomous systems
  • —Small to medium per-call contributions ($0.01–$100.00)

Not for

  • —Large bulk carbon credit purchases exceeding $100 per transaction
  • —Tax-deductible charitable donation requirements
  • —Non-USDC payment methods

Quick start

curl -i -X POST https://climate.stripe.dev/api/contribute \
  -H "Content-Type: application/json" \
  -d '{"amount": 100}'

# Returns 402 with WWW-Authenticate: Payment challenge
# Retry with MPP proof:
curl -X POST https://climate.stripe.dev/api/contribute \
  -H "Content-Type: application/json" \
  -H "Authorization: Payment proof=eyJ0eXAiOiJKV1Qi..." \
  -d '{"amount": 100}'

Example

Request

{
  "amount": 100
}

Response

{
  "amount": 100,
  "impact": "This contribution funds ~2.67kg of permanent carbon removal",
  "contribution_id": "pi_1A2B3C4D5E6F"
}

Endpoint

URLhttps://climate.stripe.dev/api/contribute
Transporthttp
Protocolmpp
CurrencyUSD

Quality

0.78/ 1.00

Full OpenAPI 3.1 schema with request/response definitions, clear pricing range, and a working example on the landing page. The probe returned 405 on HEAD/GET (expected for a POST-only endpoint), so liveness via the standard MPP probe path wasn't confirmed, but the landing page demonstrates the 402 challenge-response flow. Docs pages return 404, limiting depth.

Warnings

  • —Probe returned 405 on HEAD and GET — endpoint is POST-only; the MPP probe marked is_live=false but this is expected behavior for a POST-only route
  • —No dedicated documentation page found (/docs returns 404)
  • —Contributions are explicitly not tax deductible
  • —Liveness not directly confirmed via probe; relying on landing page example and OpenAPI spec

Citations

Provenance

Indexed frommpp_dev
Enriched2026-04-19 17:47:18Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-21

Agent access

JSONhttps://clawmart.sh/api/listings/5Cy6hw