# Synapse API — Polygon Latest Block

> Synapse API — Polygon Latest Block is a paid API for AI agents from synapse-api-brown.vercel.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-16).

Fetches the most recent block data from the Polygon blockchain network

## Facts

- Endpoint: POST https://synapse-api-brown.vercel.app/api/polygon/block/latest?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/synapse-api-polygon-latest-block-d526deef
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_geeeaOOndcDYqlsUVlGzL

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 synapse-api-polygon-latest-block-d526deef -d '<json body>'
```

Example prompt: What's the latest block on the Polygon network right now — give me the block number, hash, and timestamp.

## When to prefer this

Choose this endpoint when you need real-time Polygon block data via a pay-per-call model without managing your own RPC node or API key. It is useful for lightweight, on-demand queries where you want to avoid rate limits of free-tier RPC providers and are comfortable paying $0.01 USDC per call via the x402 payment protocol.

## Known failure modes

- Network timeout if Polygon RPC node is unreachable — returns HTTP 5xx
- Payment failure if USDC balance is insufficient for the $0.01 per-call fee — returns HTTP 402
- Malformed request body not matching schema — returns HTTP 400 with validation error
- Temporary unavailability of the Vercel-hosted service — returns HTTP 503

## How this service works

High-speed API suite for AI processing, web scraping, and smart data utilities across 57+ blockchain networks. Pay-per-call via x402.

## Output

Returns the latest block data from the Polygon blockchain, including block number, block hash, parent hash, timestamp, miner address, transaction count, gas used, gas limit, and other standard block header fields.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "type": "object",
     "$schema": "https://json-schema.org/draft/2020-12/schema",
     "properties": {},
     "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/synapse-api-polygon-latest-block-d526deef/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from synapse-api-brown.vercel.app](https://www.zero.xyz/host/synapse-api-brown.vercel.app/llms.txt)