# NO HANDS AI RPC Preflight Checker

> NO HANDS AI RPC Preflight Checker is a paid API for AI agents from nohands-coinbase-bazaar.bytoken2023.workers.dev, paid per call via x402, $0.005001/call, status unknown (last checked 2026-11-02).

Validates an agent RPC or x402 chain-data request before payment by checking endpoint origin safety, method risk level, blockchain network fit, price, and budget constraints.

## Facts

- Endpoint: GET https://nohands-coinbase-bazaar.bytoken2023.workers.dev/v1/x402/agent/rpc-preflight?utm_source=zero.xyz
- Price: $0.005001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-11-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/no-hands-ai-rpc-preflight-checker-088e94c8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_4-PAtDT_TGQHWq3z7O6cz

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 no-hands-ai-rpc-preflight-checker-088e94c8
```

Example prompt: Before my agent pays to call the eth_sendRawTransaction method on the Ethereum mainnet RPC at https://mainnet.infura.io/v3/mykey, run a preflight check to confirm the endpoint is trusted, the method risk is acceptable, the chain fits, and the price of $0.005 USDC is within my $1.00 budget.

## When to prefer this

Use this endpoint when an AI agent is about to make a paid x402 or RPC chain-data call and needs a pre-execution safety gate — especially when the endpoint origin is unfamiliar, the method could be destructive (write/send), the chain identity needs confirmation, or budget enforcement is required. Prefer this over the budget-route planner when you need a single-request go/no-go decision rather than multi-step routing.

## Known failure modes

- Invalid or unreachable RPC origin URL returns an origin safety failure
- Unknown or unsupported chain ID returns a chain fit mismatch error
- Missing required parameters (origin, method, chain, price, budget) returns a 400 bad request
- Price exceeds declared budget returns a budget-exceeded block result
- Unrecognized RPC method returns an unknown method risk warning

## How this service works

Preflight an agent RPC or x402 chain-data request before payment: endpoint origin, method risk, chain fit, price, and budget checks.

## Output

Returns a structured preflight advisory including: endpoint origin safety verdict, method risk classification, chain/network compatibility result, price evaluation, and budget sufficiency check — helping the agent decide to proceed, warn, or block the request before any payment is made.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "endpoint_url",
      "chain",
      "method"
     ],
     "properties": {
      "chain": {
       "type": "string",
       "example": "base",
       "pattern": "^[A-Za-z0-9:_ -]{2,80}$",
       "description": "Requested chain or CAIP-2 network label."
      },
      "method": {
       "type": "string",
       "example": "eth_blockNumber",
       "pattern": "^[A-Za-z0-9_.:-]{2,80}$",
       "description": "RPC method, REST operation, or query action."
      },
      "endpoint_url": {
       "type": "string",
       "example": "https://x402.example.com/rpc/base",
       "pattern": "^https?://",
       "maxLength": 2048,
       "description": "RPC, x402, REST, or indexed chain-data endpoint URL."
      },
      "max_price_usdc": {
       "type": "string",
       "example": "0.001",
       "pattern": "^[0-9]+(?:\\.[0-9]{1,6})?$",
       "description": "Maximum acceptable price for this request."
      },
      "session_budget_usdc": {
       "type": "string",
       "example": "1.00",
       "pattern": "^[0-9]+(?:\\.[0-9]{1,6})?$",
       "description": "Remaining session budget available to the agent."
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "x-schema-family": "STRUCTURED_PRODUCT_RESULT",
     "x-schema-authority": "STRUCTURED_PRODUCT_RESULT",
     "additionalProperties": true
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/no-hands-ai-rpc-preflight-checker-088e94c8/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from nohands-coinbase-bazaar.bytoken2023.workers.dev](https://www.zero.xyz/host/nohands-coinbase-bazaar.bytoken2023.workers.dev/llms.txt)