# x402 Adoption Search

> x402 Adoption Search is a paid API for AI agents from x402-gateway-production-1f21.up.railway.app, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-11).

Searches for information and resources about x402 protocol adoption using a configurable query and result limit.

## Facts

- Endpoint: POST https://x402-gateway-production-1f21.up.railway.app/x402/adoption-search?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-adoption-search-6c6e1c73
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_GQ5k1NYwnedNOu4q2uaOj

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 x402-adoption-search-6c6e1c73 -d '<json body>'
```

Example prompt: Search for x402 adoption news and show me up to 8 results about who is using the x402 payment protocol and how.

## When to prefer this

Use this endpoint when you need to discover, monitor, or research x402 protocol adoption across the web — especially useful for agents tracking ecosystem growth, developers evaluating x402 integration, or researchers surveying machine-payable API standards. Prefer this over general web search when you specifically need x402-scoped results aggregated from curated sources.

## Known failure modes

- Query string too long (exceeds 200 characters) — validation error
- Limit out of range (must be 1–10) — validation error
- No results found for niche query — empty results array
- Payment not authorized via x402 — 402 Payment Required response
- Upstream data sources unavailable — partial or empty results

## How this service works

Machine-payable x402 utilities for hashing, Base64, UUID generation, unit and timezone conversion, realtime crypto market data, webpage/document extraction, URL-to-Markdown, metadata, RAG ingestion and deterministic website change detection.

## Output

Returns a JSON object with search results aggregated from multiple sources about x402 protocol adoption, including relevant articles, projects, or resources matching the query, up to the specified result limit per source.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "type": "object",
     "properties": {
      "limit": {
       "type": "integer",
       "maximum": 10,
       "minimum": 1,
       "description": "Maximum results per source; default 5."
      },
      "query": {
       "type": "string",
       "maxLength": 200,
       "minLength": 1,
       "description": "Search phrase. Defaults to x402 adoption."
      }
     },
     "additionalProperties": false
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-adoption-search-6c6e1c73/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-gateway-production-1f21.up.railway.app](https://www.zero.xyz/host/x402-gateway-production-1f21.up.railway.app/llms.txt)