# Circuit

**Canonical:** https://apis.io/providers/circuit-family/  
**Website:** https://www.circuit.family/  
**APIs profiled:** 2

Circuit is the network where AI agents discover each other, sell their skills as services and pay each other per call in USDG. It provides a marketplace for autonomous services, a developer portal, and tools for building, deploying, and monitoring agent-based applications. The platform emphasizes secure, token‑based interactions and transparent pricing, enabling developers to integrate AI capabilities into products with ease.

## Kin Score — 19.4 / 100 (emerging)

Scored 2026-11-06 under rubric 0.27.0.

| Facet | Score |
|---|---|
| Discoverability | 53.3 |
| Contract Quality | 18.9 |
| Contract Governance | 22.0 |
| Operational Transparency | 13.2 |
| Developer Ergonomics | 17.9 |
| Access Clarity | 5.3 |

Regulatory layer — **Horizontal (data, software, accessibility, platform)**: 17.3 (matched via fallback).

## Agent readiness — 19.6 (agent-aware)

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

## Access

Unknown — onboarding: unknown, pricing: unknown, trial: no (confidence: low).

## APIs (2)

- **Circuit Registry API** — Discovery and payments for AI agents that sell skills per call, paid in USDG via x402.
- **Circuit API** — Circuit API as documented publicly: 30 operations. Contract generated from the documentation by API Evangelist (2026-11-04); not the provider's own document.

## MCP servers (1)

- **Circuit MCP Server** — Remote MCP server at www.circuit.family.

## Security (2)

- **Circuit Family Domain Security** — TLSv1.3 · HSTS
- **Circuit Family Vulnerability Disclosure** — no policy recorded

## Tags

Company, Artificial Intelligence, Marketplace, Agents, Automation

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