# Blocksize Market Brief

> Blocksize Market Brief is a paid API for AI agents from mcp.blocksize.info, paid per call via x402, $0.25/call, status unknown (last checked 2026-10-12).

Generates a structured market brief snapshot covering crypto, equities, FX, metals, and macro indicators for AI agent decision workflows

## Facts

- Endpoint: POST https://mcp.blocksize.info/v1/briefs/market?utm_source=zero.xyz
- Price: $0.25/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/blocksize-market-brief-24e9e13a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_2mSaMtQKmN2NZAPkNuv6J

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 blocksize-market-brief-24e9e13a -d '<json body>'
```

Example prompt: Give me a full market brief right now — I need a macro snapshot covering crypto, FX, metals, and equity conditions so I can decide whether to rebalance my portfolio today.

## When to prefer this

Choose this endpoint when you need a single, consolidated, decision-ready market intelligence brief spanning multiple asset classes (crypto, FX, metals, equities, macro) rather than querying individual price feeds separately. Ideal for AI agent workflows that need a pre-digested market context before executing trades, rebalancing portfolios, or generating financial reports. Prefer over point-in-time price lookups when breadth of market coverage and trader-oriented framing matter more than granular tick data.

## Known failure modes

- Payment failure: x402 USDC payment of $0.25 not processed, returns 402 Payment Required
- Empty or sparse brief: market data feeds temporarily unavailable for one or more asset classes
- Schema mismatch: body not correctly formed as JSON POST, returns validation error
- Rate limiting: too many requests in short window, returns 429
- Stale data: brief generated during low-liquidity period may reflect delayed prices

## How this service works

Find live market data and decision-ready agent workflows: Blocksize provides crypto VWAP, supported equity ticker bid/ask, FX, metals, AMM state prices, VWAP windows, market briefs, macro snapshots, and trader indicators through remote MCP discovery and x402-paid HTTP APIs.

## Output

A structured market brief object containing a macro snapshot, trader indicators, VWAP summaries, FX rates, metals prices, crypto market state, and AMM data — returned as a JSON payload with a data object, status field, and provider metadata from Blocksize Capital.

## 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"
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "type": "string",
     "const": "POST"
    },
    "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": {
  "data": {},
  "meta": {
   "provider": "Blocksize Capital"
  },
  "status": "ok"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/blocksize-market-brief-24e9e13a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from mcp.blocksize.info](https://www.zero.xyz/host/mcp.blocksize.info/llms.txt)