# Signal Sprint Base Block (fiatdock.com)

> Signal Sprint Base Block (fiatdock.com) is a paid API for AI agents from fiatdock.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-22).

A pay-per-call MCP proxy tool named 'Signal Sprint Base Block' hosted on fiatdock.com, forwarding JSON-RPC 2.0 requests to a seller's MCP endpoint for $0.005 USDC per call.

## Facts

- Endpoint: GET https://fiatdock.com/s/svc_f829d83a-001c-4afe-b51c-2da6f018da96?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-22
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/signal-sprint-base-block-fiatdock-com-b88caf24
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_1vf7vPT0ikHlyOsl6bhHf

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 signal-sprint-base-block-fiatdock-com-b88caf24
```

Example prompt: Call the Signal Sprint Base Block tool on fiatdock — send a JSON-RPC 2.0 tools/call request with the method 'tools/call' and the appropriate params, paying 0.005 USDC per call via x402.

## When to prefer this

Choose this endpoint when you need to invoke the Signal Sprint Base Block tool specifically via the fiatdock x402 micropayment marketplace and you are prepared to handle JSON-RPC 2.0 request construction. Best suited for automated agents that need to pay-per-call without managing a subscription.

## Known failure modes

- Missing or malformed required params returns an argument error (still billed as a settled call)
- Invalid JSON-RPC 2.0 format causes forwarding failure
- Seller's MCP server is unavailable or times out
- Insufficient USDC balance causes x402 payment failure
- Unknown tool name returns a JSON-RPC error from the seller server

## How this service works

Pay-per-call: Signal Sprint Base Block

## Output

The raw JSON-RPC 2.0 response forwarded verbatim from the seller's MCP endpoint, which may include tool result data, error objects, or argument errors depending on the params 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": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "blockHash"
     ],
     "properties": {
      "blockHash": {
       "type": "string"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/signal-sprint-base-block-fiatdock-com-b88caf24/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from fiatdock.com](https://www.zero.xyz/host/fiatdock.com/llms.txt)