# Synapse API — Bob RPC Endpoint

> Synapse API — Bob RPC Endpoint 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 2026-10-10).

JSON-RPC endpoint for AI processing, web scraping, and blockchain data utilities across 57+ networks, paid per-call via x402

## Facts

- Endpoint: POST https://synapse-api-brown.vercel.app/api/bob/rpc?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-10
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/synapse-api-bob-rpc-endpoint-7fc6372c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_L9gF0iUINfLeAui8ITNvE

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-bob-rpc-endpoint-7fc6372c -d '<json body>'
```

Example prompt: Use the Synapse Bob RPC endpoint to call the 'getBalance' method with params ['0xABC123...'] on Ethereum — I need the current wallet balance, and I'll pay the $0.01 USDC per-call fee via x402.

## When to prefer this

Choose this endpoint when you need a single pay-per-call JSON-RPC interface covering AI processing, web scraping, and multi-chain blockchain queries without a subscription. Best when you want micro-payment access (x402/USDC) to 57+ blockchain networks or need to combine scraping and on-chain data in one API suite.

## Known failure modes

- Invalid or unsupported method name returns an error response
- Missing or malformed params array causes parameter validation failure
- Payment not provided or insufficient USDC via x402 results in 402 Payment Required
- Unsupported blockchain network identifier returns network-not-found error
- Rate limiting if too many calls made in rapid succession
- Target website blocking scrape requests returns empty or error result
- Vercel cold-start latency on first call after idle period

## 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 a JSON-RPC style response containing the result of the called method — which may be blockchain state data, scraped web content, AI-processed output, or a computed utility result depending on the method invoked.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "method": {
   "type": "string"
  },
  "params": {
   "type": "array",
   "items": {}
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/synapse-api-bob-rpc-endpoint-7fc6372c/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)