# Delx Verified Directory

> Delx Verified Directory is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-17).

Queries Delx's verified capability directory to find AI agent services that have been probe-verified and match a given capability description.

## Facts

- Endpoint: POST https://api.delx.ai/api/v1/x402/verified-directory?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-17
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/delx-verified-directory-c17c4f26
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_MX7NgW0SrWB2qxd9Se2NE

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 delx-verified-directory-c17c4f26 -d '<json body>'
```

Example prompt: Search the Delx verified directory for probe-confirmed agent services that handle 'geocoding' and tell me what comes up.

## When to prefer this

Choose this endpoint when you specifically need probe-verified, Delx-curated service listings rather than a general web search or unvetted API directory. It is ideal for agent-to-agent discovery workflows where trust provenance matters — results are backed by actual probe receipts, not just self-reported metadata. Prefer it over generic API catalogues when you want a filtered, pay-per-result signal with low noise.

## Known failure modes

- Empty results (count: 0, results: []) when no probe-verified services match the capability query
- Capability string exceeds 120 characters — validation error
- Capability string is empty or missing — validation error
- Payment failure or insufficient USDC balance — 402 response blocking the request
- Network timeout if the directory index is temporarily unavailable

## How this service works

Find live x402 endpoints worth paying, by capability: returns only
endpoints Delx has live-probed, each with liveness score, last-observed
timestamp, observed price, response-shape validity and Agents Hive ban-list
status; every row cites its probe receipt, and ghost endpoints and dead
quotes are filtered out before you spend.
Limitation: observations, not endorsements — freshness is bounded by the
last probe cycle, and absence from the directory means unprobed, not unsafe.

## Output

Returns a JSON object containing a count of matching verified capabilities, an array of result entries, the echoed capability query string, and a disclaimer noting that results represent observations rather than endorsements.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "capability": {
   "type": "string",
   "maxLength": 120,
   "minLength": 1,
   "description": "Capability query matched against Delx-owned probe receipts only."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "count": 0,
  "results": [],
  "capability": "dns",
  "disclaimer": "observations, not endorsements"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/delx-verified-directory-c17c4f26/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.delx.ai](https://www.zero.xyz/host/api.delx.ai/llms.txt)