# x402 Field Instruments – x402-route (API Routing & Liveness)

> x402 Field Instruments – x402-route (API Routing & Liveness) is a paid API for AI agents from bj7e26lfpo4fthvr35hczdipby.srv.us, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-14).

Given a natural-language description of a capability need, finds live x402 API endpoints that match, verifies their liveness, checks pricing against a budget, and recommends the best one to call.

## Facts

- Endpoint: GET https://bj7e26lfpo4fthvr35hczdipby.srv.us/v1/x402-route
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-field-instruments-x402-route-api-routing-liveness-ea42f531
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Vum5RDnyTdaiTy2yuzfVH

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-field-instruments-x402-route-api-routing-liveness-ea42f531
```

Example prompt: I need to find a live, reliable x402 API that can do FCC radio license lookups by company name — my budget is $2 per call, so route me to the best option available right now.

## When to prefer this

Choose this endpoint when an AI agent needs to dynamically discover and route to the right x402 paid API at runtime, especially when liveness and budget compliance matter. Prefer it over static API catalogs when you need real-time verification that an endpoint is actually live and priced within budget. It is especially valuable in agent pipelines that must self-select among multiple competing paid data sources without hard-coding a specific provider.

## Known failure modes

- No live endpoints found matching the described need — returns empty verified list
- All matching endpoints exceed the max_price budget — recommendation absent
- Liveness check times out for a candidate endpoint — verdict may be stale or unavailable
- Ambiguous or overly broad 'need' description yields irrelevant matches
- Payment of $0.05 USDC fails or is rejected — endpoint returns 402 without result

## How this service works

Seven account-free paid tools for source integrity, x402 catalog search, preflight, liveness, routing, price drift, and batch verification.

## Output

Returns a JSON object containing: the matched and recommended API endpoint URL with its price in USDC, a liveness verdict (e.g. 'live_paid'), a safe_to_pay flag, reliability signals (how many times it's been seen), reasons for the recommendation, and a list of rejected endpoints with reasons (e.g. 'known gone in liveness index').

## 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"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "need"
     ],
     "properties": {
      "need": {
       "type": "string",
       "description": "The capability you need, in your own words"
      },
      "max_price": {
       "type": "string",
       "description": "Budget ceiling per call in USDC"
      }
     },
     "additionalProperties": false
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "need": "FCC radio license lookup by company",
  "verified": [
   {
    "live": {
     "verdict": "live_paid",
     "price_usdc": 1.25,
     "safe_to_pay": true
    },
    "resource": "https://..."
   }
  ],
  "budget_usdc": 2,
  "routeVersion": "1.0",
  "recommendation": {
   "why": [
    "verified live just now",
    "within budget 2",
    "seen 3x, reliability 1",
    "price matches its catalog listing"
   ],
   "resource": "https://api.govparse.io/v1/fcc/licenses/search",
   "price_usdc": 1.25
  },
  "rejected_before_verification": [
   {
    "reason": "known gone in the liveness index",
    "resource": "https://..."
   }
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-field-instruments-x402-route-api-routing-liveness-ea42f531/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from bj7e26lfpo4fthvr35hczdipby.srv.us](https://www.zero.xyz/host/bj7e26lfpo4fthvr35hczdipby.srv.us/llms.txt)