Toucan

Toucan builds digital infrastructure for carbon credit markets, providing the rails for buying, selling, and retiring carbon credits on-chain. Its Carbon Bridge tokenizes credits from registries like Puro Earth into TCO2 tokens, carbon pools such as CHAR (biochar) bundle credits into liquid reference tokens, and retirement certificates prove offsets on-chain. Developers build on Toucan through audited smart contracts on Base, Celo, and Polygon, the toucan-sdk JavaScript/TypeScript SDK, and GraphQL subgraphs served through The Graph on six networks.

Toucan publishes 1 API on the APIs.io network. Tagged areas include Company, Planetary Health, Carbon Credits, Climate, and Web3.

Toucan’s developer surface includes engineering blog, documentation, API reference, getting-started guide, support, sandbox, authentication, and 15 more developer resources.

🌐 Visit website 📡 Source on GitHub
32.9/100 thin ▬ flat Agent 17/100 agent aware Full breakdown ↓
scored 2026-07-27 · rubric v0.5
AccessSelf serve
1 APIs
CompanyPlanetary HealthCarbon CreditsClimateWeb3Carbon MarketsTokenizationGraphQLBiochar

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5
Composite quality — 32.9/100 · thin
Contract Quality 0.0 / 25
Developer Ergonomics 13.0 / 20
Commercial Clarity 6.8 / 20
Operational Transparency 3.8 / 13
Governance 0.0 / 12
Discoverability 9.3 / 10
Agent readiness — 17/100 · agent aware
Machine-Readable Contract 0 / 18
Agentic Access Contract 0 / 15
MCP Server 0 / 12
Machine-Readable Auth 10 / 10
Idempotency 0 / 9
Stable Error Semantics 8 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 0 / 7
Typed Event Surface 0 / 6
Agent Skills 0 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/toucan: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 1

Individual APIs this provider publishes, each with its own machine-readable definition.

Toucan Subgraph API

GraphQL subgraphs providing endpoints for querying Toucan infrastructure and ecosystem data (projects, TCO2s, pools, retirements) on Base, Base Sepolia, Polygon, Amoy, Celo, and...

Security Posture 2

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Toucan Authentication

apiKey/web3-wallet · 2 schemes

SECURITY

Toucan Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Resources

Get Started 4

Portal, sign-up, and the first successful call

DeveloperPortal
DeveloperPortal
 GettingStarted
GettingStarted
 Login
Login
 Sandbox
Sandbox

Documentation 2

Reference material describing how the API behaves

Documentation
Documentation
 APIReference
APIReference

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt
LLMsTxt

Design & Contract 3

Pagination, idempotency, versioning, errors, and events

ErrorCatalog
ErrorCatalog
 Lifecycle
Lifecycle
 Conformance
Conformance

Build 3

SDKs, sample code, and the tooling you integrate with

GitHubOrganization
GitHubOrganization
 Packages
Packages
 SDKs
SDKs

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity
 Authentication
Authentication

Operate 3

Status, limits, changes, and where to get help

Support
Support
 Deprecation
Deprecation
 ChangeLog
ChangeLog

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService
TermsOfService
 PrivacyPolicy
PrivacyPolicy

Company 2

The organization behind the API

Website
Website
 Blog
Blog

Source (apis.yml)

apis.yml Raw ↑ 
aid: toucan
name: Toucan
description: Toucan builds digital infrastructure for carbon credit markets, providing the rails for buying, selling, and
  retiring carbon credits on-chain. Its Carbon Bridge tokenizes credits from registries like Puro Earth into TCO2 tokens,
  carbon pools such as CHAR (biochar) bundle credits into liquid reference tokens, and retirement certificates prove offsets
  on-chain. Developers build on Toucan through audited smart contracts on Base, Celo, and Polygon, the toucan-sdk JavaScript/TypeScript
  SDK, and GraphQL subgraphs served through The Graph on six networks.
url: https://raw.githubusercontent.com/api-evangelist/toucan/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- obvious-ventures
x-tier: stub
x-tier-reason: portfolio-lead
accessModel:
  pricing: unknown
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Self-serve signup
  confidence: medium
  source:
  - authentication
  generated: '2026-07-22'
  method: derived
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-21'
image: https://toucan.earth/wp-content/uploads/2024/05/transparent.png
tags:
- Company
- Planetary Health
- Carbon Credits
- Climate
- Web3
- Carbon Markets
- Tokenization
- GraphQL
- Biochar
apis:
- name: Toucan Subgraph API
  description: GraphQL subgraphs providing endpoints for querying Toucan infrastructure and ecosystem data (projects, TCO2s,
    pools, retirements) on Base, Base Sepolia, Polygon, Amoy, Celo, and Celo Alfajores, served through The Graph gateway with
    a Graph Studio API key.
  humanURL: https://docs.toucan.earth/developers/subgraph
  baseURL: https://gateway-arbitrum.network.thegraph.com
  tags:
  - GraphQL
  - Subgraph
  - Carbon Credits
  properties:
  - type: Documentation
    url: https://docs.toucan.earth/developers/subgraph
  - type: Playground
    url: https://thegraph.com/explorer/subgraphs/AEJ5PEDye6Z198HRQBioG6mZ6ZacHenBg2HTopZPsUCi?view=Query&chain=arbitrum-one
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: DomainSecurity
  url: security/toucan-domain-security.yml
- type: Website
  url: https://toucan.earth
- type: Blog
  url: https://blog.toucan.earth
- type: Documentation
  url: https://docs.toucan.earth/
- type: DeveloperPortal
  url: https://docs.toucan.earth/developers/toucan-developer-resources
- type: APIReference
  url: https://docs.toucan.earth/developers/subgraph
- type: GettingStarted
  url: https://docs.toucan.earth/developers/sdk/quickstart
- type: Support
  url: https://docs.toucan.earth/developers/support
- type: GitHubOrganization
  url: https://github.com/ToucanProtocol
- type: TermsOfService
  url: https://toucan.earth/terms-of-service/
- type: PrivacyPolicy
  url: https://toucan.earth/privacy-policy/
- type: Login
  url: https://app.toucan.earth/
- type: Packages
  url: packages/toucan-packages.yml
- type: SDKs
  url: packages/toucan-packages.yml
- type: LLMsTxt
  url: llms/toucan-llms.txt
- type: ErrorCatalog
  url: errors/toucan-error-codes.yml
- type: Sandbox
  url: sandbox/toucan-sandbox.yml
- type: Lifecycle
  url: lifecycle/toucan-lifecycle.yml
- type: Deprecation
  url: https://docs.toucan.earth/resources/archives/verra-bridge-deprecated
- type: Authentication
  url: authentication/toucan-authentication.yml
- type: Conformance
  url: conformance/toucan-conformance.yml
- type: ChangeLog
  url: changelog/toucan-changelog.yml
x-enrichment:
  date: '2026-07-21'
  status: enriched
  artifacts_added: 10
  pass: local-v1