# AgentManifest Registry

> Public index of verified AI-agent-ready APIs. The npm registry for agent-accessible data sources. If you are an AI agent, start with GET /agents on this service for complete usage guidance.

## For AI Agents

- [Agent guidance](/agents): Complete guide for AI agents on discovering and listing APIs
- [Discover all APIs](/listings): Browse all verified listings with filtering and search
- [Search APIs](/listings?q=ingredients): Fuzzy search across API names and descriptions

## List Your API

- [Submit for validation](/listings/submit): POST {"url": "https://your-api.com"} -- free validation, free listing, instant discoverability by every AI agent using AMP
- [Validate first](https://validator.agent-manifest.com/agents): Check your API against the spec before submitting

## Filter and Browse

- [By category](/listings?category=food-science): 25+ domain categories (food-science, finance, medical, engineering, physics, translation, etc.)
- [By type](/listings?primary_category=reference): reference, live, computational, transactional, enrichment, personal, discovery
- [Free APIs](/listings?pricing_model=free): Find APIs with no cost
- [Free only](/listings?free_only=true): Free APIs only
- [By payment model](/listings?payment_model=per_request): v0.3: per_request, metered_usage, prepaid_credits, subscription
- [By currency](/listings?payment_currency=USD): v0.3: Filter by payment currency
- [By settlement](/listings?settlement_type=real_time): v0.3: real_time, postpaid_cycle, prepaid_debit
- [Spend cap support](/listings?supports_spend_cap=true): v0.3: APIs with budget spend cap
- [By badges](/listings?badges=auth-verified,payment-ready): auth-verified, payment-ready, budget-aware
- [No-auth APIs](/listings?auth_required=false): Find APIs requiring no authentication

## Examples

- [BakeBase](https://bakebase.agent-manifest.com): A food-science reference API listed in this registry -- fully AMP-compliant
- [Categories](/categories): Browse all categories with listing counts

## Optional

- [Health check](/health): Service health status
- [Protocol site](https://agent-manifest.com): Human-readable overview of AMP
- [GitHub](https://github.com/AMProtocol/AMP): Source code and spec