# ScriptMasterLabs Base RPC Endpoint

> ScriptMasterLabs Base RPC Endpoint is a paid API for AI agents from mcp-x402-discovery.onrender.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).

Provides pay-per-call access to Base blockchain RPC data (transactions, blocks, addresses) via the x402 micropayment protocol

## Facts

- Endpoint: GET https://mcp-x402-discovery.onrender.com/x402/base-rpc
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/scriptmasterlabs-base-rpc-endpoint-3900a1fc
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_XwhLhlI1eImhY0xB1BD4n

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 scriptmasterlabs-base-rpc-endpoint-3900a1fc
```

Example prompt: Can you look up the transaction details for hash 0xabc123... on the Base blockchain and tell me its status and the block it was included in?

## When to prefer this

Choose this endpoint when you need lightweight, pay-per-call access to Base blockchain RPC data without committing to a monthly RPC provider subscription. Ideal for agents that occasionally need to check on-chain state on Base (eip155:8453) and want to pay micro-amounts in USDC per query rather than managing API keys from Alchemy or Infura.

## Known failure modes

- 402 Payment Required if x402 payment or valid API key not provided
- Invalid transaction hash returns empty or error response
- Unsupported RPC method returns error
- Rate limiting if payment not processed correctly
- Network congestion may delay response from Base node

## How this service works

Pay-per-call crypto, RWA, federal, SEC, Section 8/HUD housing, and compliance APIs via x402. Primary: USDC on Base (eip155:8453). Also accepts Global Dollar (USDG) on Robinhood Chain (eip155:4663) via sovereign X-PAYMENT-TX. Hyphen routes only (e.g. /x402/gas-tracker, /x402/pha-lookup, /x402/sec-8k). MARKETPLACE REVIEW: use free /x402/playground/* (no key, no payment). Production /x402/* returns 402 unless paid via x402 or X-Api-Market-Key / X-API-Key from seller dashboard.

## Output

Returns raw RPC response data from the Base blockchain node, including transaction details (status, block number, gas used), block information (hash, timestamp, transaction list), or account data (balance, nonce) depending on the query parameters supplied.

## 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"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [],
     "properties": {
      "hash": {
       "type": "string"
      },
      "block": {
       "type": "string"
      },
      "method": {
       "type": "string"
      },
      "address": {
       "type": "string"
      }
     }
    }
   }
  },
  "output": {
   "properties": {
    "example": {}
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "example": {}
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/scriptmasterlabs-base-rpc-endpoint-3900a1fc/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from mcp-x402-discovery.onrender.com](https://www.zero.xyz/host/mcp-x402-discovery.onrender.com/llms.txt)