# santyvv-data Chain RPC Endpoint

> santyvv-data Chain RPC Endpoint is a paid API for AI agents from x402.santyvv.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-11).

Provides keyless, pay-per-call access to blockchain RPC calls on Base via the x402 micropayment protocol, paid in USDC with no account or API key required.

## Facts

- Endpoint: POST https://x402.santyvv.com/api/chain/rpc?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/santyvv-data-chain-rpc-endpoint-27ddb65c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_utsDGUhruXs0IaA-tZ6e3

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 santyvv-data-chain-rpc-endpoint-27ddb65c -d '<json body>'
```

Example prompt: Make a JSON-RPC call to the Base blockchain — I want to query the latest block number — and pay the $0.02 USDC fee automatically via x402, no API key needed.

## When to prefer this

Prefer this endpoint when you need keyless, accountless access to Base blockchain RPC calls and want to pay only per successful call in USDC via x402. Ideal for agents that don't have pre-provisioned API keys for RPC providers, need edge-cached responses, or benefit from multi-source fallback without managing provider accounts. Not suitable if you need EVM chains other than Base, or if you require free-tier RPC access.

## Known failure modes

- Insufficient USDC balance for the $0.02 x402 micropayment — returns HTTP 402 Payment Required
- Invalid or malformed RPC method/body — returns an RPC error object
- Upstream RPC provider unavailable — multi-source fallback may still succeed, but all sources failing returns a 503
- Unsupported bodyType value — returns a 400 Bad Request
- Network congestion causing slow response on Base

## How this service works

Market and on-chain data, paid per call in USDC on Base through the x402 protocol. No accounts, no API keys. Sources are public data providers; the value added here is keyless access, edge caching, multi-source fallback and normalised responses.

## Output

Returns a normalized JSON-RPC response containing the requested on-chain data (e.g. block data, account balance, transaction receipt, contract state), served from an edge-cached multi-source fallback setup. The response mirrors standard JSON-RPC 2.0 structure with a result or error field.

## 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": {
     "properties": {}
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/santyvv-data-chain-rpc-endpoint-27ddb65c/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.santyvv.com](https://www.zero.xyz/host/x402.santyvv.com/llms.txt)