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

32.5/100 thin ▬ flat Agent 5/100 agent aware saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

1 APIs

Company Planetary Health Carbon Credits Climate Web3 Carbon Markets Tokenization GraphQL Biochar

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 32.5/100 · thin

Contract Quality 0.0 / 21

Developer Ergonomics 11.5 / 17

Access Clarity 4.7 / 17

Operational Transparency 2.9 / 11

Contract Governance 0.5 / 10

Discoverability 6.5 / 9

Regulatory Posture 4.7 / 15

Agent readiness — 5/100 · agent aware

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

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

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Regulatory Posture applies to this provider. Its tags matched the Health regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. 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. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

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

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)

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
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  - security
  - sandbox
  generated: '2026-09-03'
  method: derived
specificationVersion: '0.23'
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

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