# Loop Crypto

**Canonical:** https://apis.io/providers/loop-crypto/  
**Website:** https://docs.loopcrypto.xyz  
**APIs profiled:** 1

Loop Crypto is a crypto and stablecoin payment processor that lets merchants, billing software, and e-commerce platforms accept crypto and stablecoin payments end to end: charging a wallet, storing payment methods, accepting stablecoins, ERC-20 tokens, and Solana SPL tokens, and settling to merchants in either fiat or crypto. Loop offers payment links, an embeddable Pay/PayIn checkout component, a white-labelable Connect widget, and a REST API (v1/v2, api-key + entity-id header auth) covering customers, entities, merchants, tokens, payments, payouts, and webhooks, plus out-of-the-box integrations with Stripe, Chargebee, and OpenPay. Backed by a16z. NOTE: Loop is winding down and folding into Lead; the service was sunset on 2026-02-13 and is not recommended for new integrations.

## Kin Score — 31.2 / 100 (thin)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 31.2).

| Facet | Score |
|---|---|
| Discoverability | 75.9 |
| Contract Quality | 45.1 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 18.4 |
| Developer Ergonomics | 53.6 |
| Commercial Clarity | 6.6 |
| Access Clarity | 6.6 |

Regulatory layer — **Payments**: 18.8 (matched via tags).

## Agent readiness — 29.1 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | yes |
| Idempotency | no |
| 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 |

## Access

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

## APIs (1)

- **Loop Crypto API** — REST API for accepting crypto and stablecoin payments — customers, entities, merchants, tokens, payments, payouts, and webhooks. Authenticated with api-key and entity-id headers...

## Security (2)

- **Loop Crypto Authentication** — apiKey · 2 schemes
- **Loop Crypto Domain Security** — DNSSEC · DMARC

## Tags

Company, Payments, Cryptocurrency, Stablecoins, Web3, Payment Processing, Billing, Solana, Ethereum

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