# JMT X402 Proxy - Search-Grounded Answer Synthesis

> JMT X402 Proxy - Search-Grounded Answer Synthesis is a paid API for AI agents from jmt-x402-proxy.jmthomasofficial.workers.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14, last successful call 2026-08-13).

Takes a natural language question, retrieves current web results, and returns a synthesized answer with cited source URLs generated by a local LLM.

## Facts

- Endpoint: GET https://jmt-x402-proxy.jmthomasofficial.workers.dev/v2/api/answer
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Last successful call: 2026-08-13
- Success rate: 100% of calls made through Zero
- Rating: 4.0 / 5 from 1 review
- Activations on Zero: 1
- Tags: x402
- Canonical page: https://www.zero.xyz/c/jmt-x402-proxy-search-grounded-answer-synthesis-3b2c3795
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Ev5KBz7awnbtj61ZY_n6D

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 jmt-x402-proxy-search-grounded-answer-synthesis-3b2c3795
```

Example prompt: What is the current status of the US-China trade negotiations? Give me a synthesized answer with source links.

## When to prefer this

Prefer this endpoint when you need a synthesized, human-readable answer to a factual or current-events question that cites its sources. It is especially valuable when training-data cutoffs are a concern and you need answers grounded in live web content. Choose this over raw search endpoints when you want an LLM-written summary rather than a list of raw snippets, and over cloud-based QA APIs when avoiding cloud token dependency matters. Useful for agents that need both an answer and verifiable source URLs in one call.

## Known failure modes

- Missing required query parameter 'q' returns a validation error
- Empty or whitespace-only query string rejected (minLength:1)
- Web search backend unavailable leads to degraded or empty sources
- Local LLM synthesis failure may return partial or no answer text
- Payment not processed (x402) results in 402 Payment Required before any content is returned
- Rate limiting or quota exhaustion on search provider causes timeout

## How this service works

Search-grounded answer with source URLs, synthesized by a local LLM with no cloud token dependency.

## Output

Returns a JSON object containing the original question, a synthesized natural-language answer generated by a local LLM grounded in current web results, an array of source URLs used to generate the answer, and a Unix timestamp of when the response was produced.

## 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": [
      "q"
     ],
     "properties": {
      "q": {
       "type": "string",
       "minLength": 1,
       "description": "Question to answer using current web results."
      }
     },
     "additionalProperties": false
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "required": [
      "question",
      "answer",
      "sources",
      "timestamp"
     ],
     "properties": {
      "answer": {
       "type": "string"
      },
      "sources": {
       "type": "array"
      },
      "question": {
       "type": "string"
      },
      "timestamp": {
       "type": "number"
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/jmt-x402-proxy-search-grounded-answer-synthesis-3b2c3795/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from jmt-x402-proxy.jmthomasofficial.workers.dev](https://www.zero.xyz/host/jmt-x402-proxy.jmthomasofficial.workers.dev/llms.txt)