# MCX Ventures Deep Multi-Source Synthesis

> MCX Ventures Deep Multi-Source Synthesis is a paid API for AI agents from api.mcx-ventures.com, paid per call via x402, $2/call, status unknown (last checked 2026-09-14).

Synthesizes a comprehensive answer to a question or topic by pulling from multiple sources and performing deep cross-source analysis

## Facts

- Endpoint: POST https://api.mcx-ventures.com/v2/synthesize
- Price: $2/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/mcx-ventures-deep-multi-source-synthesis-a1518c89
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_42nikW_-VlHbno_bruhsL

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 mcx-ventures-deep-multi-source-synthesis-a1518c89 -d '<json body>'
```

Example prompt: Pull together a deep synthesis on the geopolitical impact of rare earth mineral supply chains — use these three sources I'm providing plus whatever else you can draw from, and give me a comprehensive, cross-referenced answer.

## When to prefer this

Choose this endpoint when you need a deep, comprehensive synthesis across multiple sources rather than a quick lookup or single-source summary. Ideal when you have several texts or URLs to integrate and want a unified, cross-referenced answer. Prefer over the sibling 'cross-source correlation' endpoint when you want a full synthesized narrative rather than a correlation report, and over adversarial verification endpoints when your goal is synthesis rather than fact-checking.

## Known failure modes

- Query field missing — returns validation error requiring 'query' field
- Exceeds 20-source limit — sources array capped at maxItems 20, excess sources rejected
- Invalid source URL — malformed URLs in sources array may be skipped or cause partial failure
- Payment failure — x402 payment of $2 USDC not completed results in 402 response
- Timeout — deep synthesis of many sources may exceed response time limits
- Empty or ambiguous query — vague queries may produce low-quality or unfocused synthesis

## How this service works

Deep multi-source synthesis

## Output

A deeply synthesized, multi-source response to the submitted query, integrating information from any provided source texts or URLs along with the endpoint's own research capabilities into a unified, coherent analytical output.

## 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",
     "required": [
      "query"
     ],
     "properties": {
      "query": {
       "type": "string",
       "description": "Question or topic."
      },
      "sources": {
       "type": "array",
       "items": {
        "type": "string"
       },
       "maxItems": 20,
       "description": "Optional source texts or URLs."
      }
     },
     "additionalProperties": false
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST",
      "PUT",
      "PATCH"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/mcx-ventures-deep-multi-source-synthesis-a1518c89/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.mcx-ventures.com](https://www.zero.xyz/host/api.mcx-ventures.com/llms.txt)