# FiatDock: Mythos MCP — 300+ Pay-Per-Call Tools

> FiatDock: Mythos MCP — 300+ Pay-Per-Call Tools is a paid API for AI agents from fiatdock.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-18).

Provides access to a large suite of 300+ diverse tools via a single MCP endpoint, billed per call in USDC over the x402 protocol

## Facts

- Endpoint: POST https://fiatdock.com/s/svc_98f7c3a3-d615-47fa-a2a4-754e240ccbea?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-18
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/fiatdock-mythos-mcp-300-pay-per-call-tools-ce6bb7de
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_BVCAjHX9EsJLPwoUkeifL

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 fiatdock-mythos-mcp-300-pay-per-call-tools-ce6bb7de -d '<json body>'
```

Example prompt: Call the Mythos MCP server and invoke the 'web_search' tool with the query 'latest AI news' — I'll pay per call in USDC.

## When to prefer this

Choose this endpoint when you need access to a broad, diverse set of tools through a single unified MCP interface without committing to a subscription — especially useful for infrequent or exploratory tool calls where pay-per-call economics make more sense. Prefer it over building direct integrations when the Mythos tool library already covers your use case. Check the free schema endpoint first to discover tool names and required arguments before calling.

## Known failure modes

- Missing or incorrect tool arguments cause an argument error response (still billed as a settled call)
- Tool name not found on the Mythos MCP server returns a JSON-RPC error
- Malformed JSON-RPC body (wrong jsonrpc version, missing method field) causes a parse or invalid request error
- Network or upstream MCP server unavailability results in a gateway error
- Insufficient USDC balance or x402 payment failure prevents call from being made

## How this service works

Pay-per-call: Mythos MCP — 300+ Pay-Per-Call Tools

## Output

Returns the raw JSON-RPC 2.0 response from the upstream Mythos MCP server, including the tool's result payload, which varies by tool called. Each call is settled for $0.005 USDC via x402 regardless of result.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "method": {
   "type": "string",
   "description": "e.g. tools/call"
  },
  "params": {
   "type": "object",
   "description": "the seller's own tool name + arguments. The example body above is EMPTY on purpose: this listing's required arguments are not published here, and a call missing one can come back as an argument error, which is settled as your call. Read the callable shape of every tool on this seller's server free at GET https://fiatdock.com/v1/marketplace/services/svc_98f7c3a3-d615-47fa-a2a4-754e240ccbea?include=schemas"
  },
  "jsonrpc": {
   "type": "string",
   "description": "\"2.0\" — the body is forwarded VERBATIM to the seller's MCP endpoint, so send whatever that server expects"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/fiatdock-mythos-mcp-300-pay-per-call-tools-ce6bb7de/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)