cc0.company

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.

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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.

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.

Protocol	x402 v2
Network	Base mainnet — eip155:8453
Asset	USDC — 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
Scheme	exact (fixed price per call)
Facilitator	Coinbase CDP

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:

Tool	Price	What it does
cc0pedia	$0.01	Resolve one CC0 creator/collection/work by name or slug → provenance, license, on-chain pointers, full CC0 body
cc0pedia-search	$0.01	Ranked free-text search across the CC0 database
cc0pedia-verify	$0.01	License oracle — is a contract a documented CC0 work? + full provenance
cc0pedia-market	$0.01	Live market for a CC0 asset — token price/FDV/liquidity/volume, or NFT floor/volume/owners
cc0-daily-brief	$0.05	Hourly digest of the top CC0 NFT collections by 24h volume
sartoshi-gen · darkfarms-gen · hokusai-gen · van-gogh-gen · monet-gen	$0.069	CC0 image generation (async — returns a job_id to poll)
mfergpt-ask · mfergpt-lore · mfergpt-mferfy	varies	Third-party mfergpt services, re-brokered over x402

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