# Autumn (autumn-js, billing)

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

Autumn provides an open-source billing infrastructure built on top of Stripe, offering usage‑based billing, credits, entitlements, and subscription state through a simple API. It serves AI startups and other SaaS companies needing a unified system of record for subscriptions, metering, and feature access, while delegating payment processing to Stripe. The platform includes endpoints such as attach, check, and track, and is documented with quickstart guides and API references.

## Kin Score — 26.6 / 100 (thin)

Scored 2026-10-31 under rubric 0.25.0.

| Facet | Score |
|---|---|
| Discoverability | 66.1 |
| Contract Quality | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 47.4 |
| Developer Ergonomics | 47.6 |
| Access Clarity | 21.1 |

Regulatory layer — **Horizontal (data, software, accessibility, platform)**: 15.7 (matched via fallback).

## Agent readiness — 27.3 (agent-aware)

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

## APIs (1)

- **Autumn Billing API** — Autumn provides an open-source billing API built on top of Stripe, offering usage‑based billing, credits, entitlements, and subscription management.

## Security (1)

- **Autumn Domain Security** — TLSv1.3 · HSTS · DMARC

## Tags

Company, Billing, Open-Source, Stripe, AI-Startups

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