# Chain

**Canonical:** https://apis.io/providers/chain/  
**Website:** https://chain.com  
**APIs profiled:** 1

Chain is a stablecoin payments infrastructure platform that lets enterprises move money globally across both traditional banking rails and digital-currency networks. Its unified REST API covers funding, payouts and payees; virtual and physical card issuing; wallet registration with compliance screening; and a double-entry ledger for reconciliation. Chain connects ACH, Fedwire, FedNow, SEPA, Faster Payments, Visa and Mastercard with multi-stablecoin support (USDC, USDT, USDP, RLUSD) for real-time settlement and payouts to 200+ countries. The platform exposes API-key (Bearer) authentication, an idempotency-key header, webhooks with signature verification, and separate sandbox and live environments for developers.

## Kin Score — 32.7 / 100 (thin)

Scored 2026-08-30 under rubric 0.17.2. Trend: flat (+0.0 from 32.7).

| Facet | Score |
|---|---|
| Discoverability | 75.9 |
| Contract Quality | 0.0 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 42.1 |
| Developer Ergonomics | 71.4 |
| Commercial Clarity | 27.6 |
| Access Clarity | 27.6 |

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

## Agent readiness — 10.1 (agent-aware)

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

## Access

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

## APIs (1)

- **Chain API** — Chain's unified REST API for stablecoin payments (funding, payouts, payees), card issuing, wallets, and a double-entry ledger. Bearer API-key auth with sandbox and live key pref...

## Security (2)

- **Chain Authentication** — apiKey · 1 scheme
- **Chain Domain Security** — TLSv1.3 · HSTS · DMARC

## Tags

Company, Payments, Stablecoin, Cryptocurrency, Blockchain, Financial-Services, Wallets, Cards, Cross-Border Payments

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