# Mythos Agent Toolkit — 300+ Tools via FiatDock

> Mythos Agent Toolkit — 300+ Tools via FiatDock is a paid API for AI agents from fiatdock.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-18).

Provides pay-per-call access to the Mythos Agent Toolkit, exposing 300+ MCP-compatible tools through a single proxied endpoint on the FiatDock marketplace.

## Facts

- Endpoint: POST https://fiatdock.com/s/svc_4c0c457f-af5e-455e-b29a-297dd4ef900c?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-18
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/mythos-agent-toolkit-300-tools-via-fiatdock-f8243947
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_c2Lbu31ol8EqfrE0YNbv-

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 mythos-agent-toolkit-300-tools-via-fiatdock-f8243947 -d '<json body>'
```

Example prompt: I want to call a specific tool from the Mythos Agent Toolkit — it has 300+ tools available — can you first fetch the full tool schema list from FiatDock and then invoke the right tool with the right arguments for my task?

## When to prefer this

Choose this endpoint when you need access to a broad, curated set of 300+ agent tools under a single pay-per-call billing model and want MCP-compatible JSON-RPC semantics. It is especially useful when you don't know ahead of time which specific tool you'll need and want to explore the toolkit schema first. Prefer alternatives when you need a deeply specialized single-purpose API with well-documented input/output schemas, or when per-call costs need to be zero.

## Known failure modes

- Missing or incorrect tool arguments returns an argument error (still billed as a settled call)
- Calling an unsupported or misspelled tool name returns a method-not-found JSON-RPC error
- Malformed JSON-RPC body (missing jsonrpc or method fields) causes a proxy-level error
- Network timeout if the underlying Mythos MCP server is slow or unavailable
- Insufficient USDC balance causes payment failure before the call is forwarded

## How this service works

Pay-per-call: Mythos Agent Toolkit — 300+ tools

## Output

Returns a JSON-RPC 2.0 response from the Mythos MCP server containing the output of the invoked tool. The exact structure depends on which tool was called; successful responses include a result field with the tool's structured output, while errors return a JSON-RPC error object.

## 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_4c0c457f-af5e-455e-b29a-297dd4ef900c?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/mythos-agent-toolkit-300-tools-via-fiatdock-f8243947/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)