# Toucan

**Canonical:** https://apis.io/providers/toucan/  
**Website:** https://toucan.earth  
**APIs profiled:** 1

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.

## Kin Score — 32.5 / 100 (thin)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 32.5).

| Facet | Score |
|---|---|
| Discoverability | 75.9 |
| Contract Quality | 0.0 |
| Governance | 4.5 |
| Contract Governance | 4.5 |
| Operational Transparency | 26.3 |
| Developer Ergonomics | 67.9 |
| Commercial Clarity | 27.6 |
| Access Clarity | 27.6 |

Regulatory layer — **Health**: 31.3 (matched via tags).

## Agent readiness — 12.0 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | no |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | yes |
| Idempotency | no |
| Error Semantics | documented |
| OpenAPI Examples | no |
| Rate Limit Signal | no |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## Access

Self-serve signup — onboarding: self-serve, pricing: unknown, trial: no (confidence: medium).

## APIs (1)

- **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 (2)

- **Toucan Authentication** — apiKey/web3-wallet · 2 schemes
- **Toucan Domain Security** — TLSv1.3 · HSTS · DNSSEC · DMARC

## Tags

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

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/toucan/). Scores are computed from the provider's own public artifacts under a published rubric.