# Content-Usage / AIPREF (IETF AIPREF WG)

**Canonical:** https://apis.io/apis/agent-readiness/content-usage-aipref/  
**Provider:** Agent Readiness — https://apis.io/providers/agent-readiness/  
**Base URL:** https://datatracker.ietf.org/wg/aipref/about/  
**Documentation:** https://datatracker.ietf.org/wg/aipref/about/

Content-Usage / AIPREF (IETF AIPREF WG) is one of 15 APIs that [Agent Readiness](https://apis.io/providers/agent-readiness/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include Consent Signals, AI Preferences, Agent Readiness, and Standards. The published artifact set on APIs.io includes API documentation.

The IETF AIPREF working group's effort to standardise machine-readable AI usage preferences (e.g. `Content-Usage: ai-input=y, ai-train=n`). A provider that publishes explicit AIPREF signals is making its consent posture legible to agents rather than burying it in terms of service.

## Machine-readable artifacts (1)

- **Documentation** — https://datatracker.ietf.org/doc/draft-ietf-aipref-attach/

## Other Agent Readiness APIs (12)

- [Model Context Protocol (MCP)](https://apis.io/apis/agent-readiness/model-context-protocol/)
- [OpenAPI Specification](https://apis.io/apis/agent-readiness/openapi-initiative/)
- [AsyncAPI Specification](https://apis.io/apis/agent-readiness/asyncapi-initiative/)
- [JSON Schema](https://apis.io/apis/agent-readiness/json-schema/)
- [Agent Skills](https://apis.io/apis/agent-readiness/agent-skills/)
- [/.well-known/api-catalog (RFC 9727)](https://apis.io/apis/agent-readiness/well-known-api-catalog/)
- [HTTP Message Signatures (RFC 9421)](https://apis.io/apis/agent-readiness/rfc-9421-http-message-signatures/)
- [Web Bot Auth (draft)](https://apis.io/apis/agent-readiness/web-bot-auth/)
- [Cloudflare Content Signals](https://apis.io/apis/agent-readiness/cloudflare-content-signals/)
- [APIs.json](https://apis.io/apis/agent-readiness/apis-json/)
- [OpenID Connect](https://apis.io/apis/agent-readiness/openid-connect/)
- [Stripe API (reference provider)](https://apis.io/apis/agent-readiness/stripe-api/)

## Tags

Consent Signals, AI Preferences, Agent Readiness, Standards

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/agent-readiness/content-usage-aipref/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/agent-readiness/.