# CDR.fyi API

> Probe-verified (tier 2 of 3). Last checked 2026-08-23. 4 of 5 capability checks passed.

- host: docs.cdr.fyi
- url: https://docs.cdr.fyi/
- category: carbon removal data api
- type: documentation
- language: en

## Probe-verified · tier 2 of 3

Probed live on 2026-08-23 against rubric v1. 4 of 5 checks passed.

- PASS — Markdown negotiation
- PASS — Markdown twin at a predictable URL
- PASS — llms.txt
- fail — API catalog
- PASS — MCP server answers

MCP tools (from tools/list on 2026-08-23, served from cdrfyi.main-kill-isr.mintlify.me): search_cdr_fyi_api, query_docs_filesystem_cdr_fyi_api, submit_feedback

## Unverified actions

Read from the page's own content, with the wording each was drawn from. Inference is kept separate from tested facts; an agent completing the action is tier 3.

- **apply** — "If you do not have access, apply here" → `https://docs.google.com/forms/d/e/1FAIpQLSePsKG739_XlxinCT5VMlQAte7ezjaHRsXpwPANRLhxu26VCQ/viewform`
- **contact** — "reach out to us" → `mailto:support@cdr.fyi`
- **query_api** — "The CDR.FYI API is designed to help you interact programmatically" → `https://api.cdr.fyi/v1`

## Summary

CDR.fyi API documentation provides RESTful endpoints to interact programmatically with carbon removal data including orders, suppliers, marketplaces, and projects.

## Context

4827 sites in this index share the type "documentation"; 1248 are transactional.

## How we grade

- tier 1 — **Declared**: The site says agents are welcome in its robots.txt. A permission, not a capability.
- tier 2 — **Probe-verified** (this site): We fetched the site and tested each signal ourselves. Dated, repeatable, re-checked on a schedule.
- tier 3 — **Behaviourally verified**: An agent completed the action end to end — booked, bought, submitted — and it worked.

## About this record

Known-Good probes sites live and publishes what was tested and when.
Method: https://knowngood.sh/about.md · Rubric: https://knowngood.sh/benchmark