API Tools

usdf.fi

An API gateway that lists AI models and callable tools with pricing, quotes request costs, and handles x402 payments for paid API calls.

1 endpoint10 known toolsFirst detected October 17, 2026Last detected October 17, 2026

ENDPOINT 1

https://api.usdf.fi/mcp

No auth detected

MCP server metadata

Name: foundry-gateway
Version: 1.0.0

Capabilities

experimental.payment.methods.evm.intentstools.listChanged

Known tools 10

list_models

Models the gateway serves with their prices (USD per 1M tokens, the same figure in USDF), context window, output limits and whether a route is available right now.

Inferred read-only

quote

The hold the chat tool places before running a request, in USDF and USD (output capped at 4096 tokens).

Inferred read-only

list_tools

Tools callable through POST /v1/tools/{id} on the same balance and key as chat, with their price (USDF base units: 1 unit = $0.

Potential side effects

quote_tool

The hold a call to a tool takes for this input before it runs (its worst case), in USDF base units and USD, with the tool's price.

Inferred read-only

x402_pay

Calls a URL that asks for an x402 payment and pays it for you: the gateway pays the seller in USDC from its own float on Base or Solana and charges this key in USDF cost plus 5% at most, no minimum (the seller's amount and a fee of at most 5% of it; never free credit), within the key's and its agent's limits.

Potential side effects

agents_market_search

Agents, APIs and tools priced per call, in one market, every listing in the same shape: its id (svc_.

Inferred read-only

agents_market_call

Calls a listing of the agents market by its id (svc_.

Inferred read-only

chat

Runs a chat completion through the metered gateway and returns the text with its receipt (tokens, price, cost, balance, settlement).

Inferred read-only

balance

The calling key's available balance, the account's balance and held amount, and the key's budget left, in USDF (Authorization: Bearer sk_.

Inferred read-only

receipt

The receipt for a request made with the calling key: usage, price sheet version, cost, and once settled the batch, its transaction and the rows behind the onchain digest (Authorization: Bearer sk_.

Inferred read-only

CONNECT WITH APPROVAL

Client installation

Review this server and its permissions before adding it. Secret placeholders must be set locally.

Codex

~/.codex/config.toml

[mcp_servers.foundry-gateway]
url = "https://api.usdf.fi/mcp"
enabled = true

Claude Code

.mcp.json

{
  "mcpServers": {
    "foundry-gateway": {
      "type": "http",
      "url": "https://api.usdf.fi/mcp"
    }
  }
}

Claude Desktop

Settings → Connectors → Add custom connector

Name: foundry-gateway
Remote MCP URL: https://api.usdf.fi/mcp

Add this remote URL as a custom connector in Claude Desktop. Availability depends on the user plan and workspace policy.

Cursor

.cursor/mcp.json

{
  "mcpServers": {
    "foundry-gateway": {
      "url": "https://api.usdf.fi/mcp"
    }
  }
}

Visual Studio Code

.vscode/mcp.json

Add to Visual Studio Code

{
  "servers": {
    "foundry-gateway": {
      "type": "http",
      "url": "https://api.usdf.fi/mcp"
    }
  }
}

Generic MCP

Client-specific MCP configuration

{
  "name": "foundry-gateway",
  "transport": "streamable-http",
  "url": "https://api.usdf.fi/mcp"
}

MCP Inspector

Run the official MCP Inspector locally and enter the indexed Streamable HTTP endpoint.

TRUST AND VERIFICATION EVIDENCE

Loading Trust v2 evidence…

Checking the associated registrable domain. The BuiltWith key remains server-side.

Indexed

Evidence is source-attributed and does not guarantee that a third-party server is safe. Risk labels are conservative metadata heuristics.