# HTTPay Agent Directory — Curated API Search

> HTTPay Agent Directory — Curated API Search is a paid API for AI agents from httpay.xyz, paid per call via x402, $0.03/call, status unknown (last checked 2026-09-15).

Returns a curated, searchable directory of pay-per-call APIs available on httpay.xyz, filterable by search term and category

## Facts

- Endpoint: POST https://httpay.xyz/api/agent-directory-curated
- Price: $0.03/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/httpay-agent-directory-curated-api-search-ada7bcca
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_z4DgrjilNSABzDtryYHr3

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability httpay-agent-directory-curated-api-search-ada7bcca -d '<json body>'
```

Example prompt: Search the httpay curated API directory for available 'DeFi yields' endpoints so I can find a pay-per-call option that works without an API key.

## When to prefer this

Use this endpoint when an AI agent needs to discover which pay-per-call APIs are available on httpay.xyz before deciding which one to call — especially useful for dynamic capability routing, building agent tool registries, or exploring what x402-compatible services exist for a given domain like DeFi, MEV, or AI tools.

## Known failure modes

- No results returned if search term or category is too specific or misspelled
- Empty response if no APIs match the given category filter
- Payment failure if USDC balance is insufficient for the $0.03 call fee
- Stale directory if recently added APIs haven't been indexed yet

## How this service works

Curated static AI agent directory — discover x402-enabled agents and services by capability. See /api/agent-directory for the live on-chain ERC-8004 registry version.

## Output

A curated list of matching API endpoints available on httpay.xyz, including their names, descriptions, categories, pricing (in USDC per call), and capability tags — filtered by the provided search term and/or category.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "q": {
   "type": "Search term"
  },
  "category": {
   "type": "Filter by capability"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {}
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/httpay-agent-directory-curated-api-search-ada7bcca/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from httpay.xyz](https://www.zero.xyz/host/httpay.xyz/llms.txt)