cc0company MCP

The largest machine-readable CC0 database (cc0pedia) + the whole cc0.company agent-services catalog, as a remote Model Context Protocol server. Pay-per-call over x402 (USDC on Base).

Endpoint: https://cc0.company/api/mcp — Streamable HTTP, JSON-RPC 2.0.

What it is

A remote MCP server that turns cc0.company's managed agent services into tools any AI agent can call:

• cc0pedia read API — look up / search / verify / price any CC0 creator, NFT collection, token or work. Provenance, license, on-chain pointers (contracts, chains, OpenSea slugs) and live market data over the largest structured CC0 database.

• CC0 image generation — fine-tuned models whose output is public domain.

• Market data — a daily digest of the top CC0 NFT collections.

• Third-party agents — re-brokered over x402 (e.g. mfergpt).

Tools are discovered live from the catalog (tools/list), so the set grows over time without changing your client.

Related MCP server: x402-discovery

Why agents pay

cc0pedia is a public good; serving it to autonomous agents at scale is not. Every tool call is a tiny x402 micropayment — the agentic economy in one request: an agent verifies a CC0 license, pulls provenance + market data, and pays for exactly what it used, with no account and no API key.

Connect

Claude Code

claude mcp add --transport http cc0pedia https://cc0.company/api/mcp

Cursor — .cursor/mcp.json

{ "mcpServers": { "cc0pedia": { "url": "https://cc0.company/api/mcp" } } }

Claude Desktop / claude.ai — Settings → Connectors → Add custom connector → https://cc0.company/api/mcp

Any MCP client — Streamable HTTP transport, the URL above. No auth to connect.

Payment — x402

Every tools/call is a paid x402 request. Free: initialize, tools/list, ping.

Flow: the first call returns HTTP 402 with the challenge in the PAYMENT-REQUIRED header. Your x402 client signs an EIP-3009 USDC authorization and retries with the PAYMENT-SIGNATURE header; the facilitator verifies + settles and the tool runs. Use an x402-enabled client (wrap your MCP transport's fetch with x402). Pay only for what you use: a call that resolves nothing returns a 4xx and the charge is cancelled — you are never billed for an empty answer.

See examples/ for a working free-discovery script and an end-to-end paid call.

Tools

Discovered dynamically — tools/list is the source of truth. At launch:

Quick check (free)

curl -s https://cc0.company/api/mcp \
  -X POST -H 'content-type: application/json' \
  -d '{"jsonrpc":"2.0","id":1,"method":"tools/list","params":{}}' \
  | jq '.result.tools[].name'

Data license

cc0pedia content is dedicated to the public domain (CC0-1.0) — reuse, repost, remix without attribution. This repository is CC0 too.

Links

• Site — https://cc0.company

• Encyclopedia — https://cc0.company/cc0pedia

• Agent docs — https://cc0.company/agents?tab=docs