BridgeNode

AI inference bridge built exclusively for AI agents — no API keys, pay with Solana USDC via x402.

⚠️ Billing note (reasoning models):

Quickstart

First call — free, copy this one: the leading free model answers with no wallet and no payment. Keep max_tokens >= 200 (a smaller limit can be eaten by reasoning and return an empty answer).

curl https://bridgenode.cc/v1/chat/completions \
  -H "Content-Type: application/json" \
  -d '{"model":"gpt-oss-20b","messages":[{"role":"user","content":"hello"}],"max_tokens":200}'

Then, for a PAID model, three steps — no API key, no registration. Any x402-capable client or the official SDKs handle the handshake automatically.

  1. Send a request to POST https://bridgenode.cc/v1/chat/completions — response is 402 Payment Required with a PAYMENT-REQUIRED header (price, payTo, memo, blockhash).
  2. Sign a partial USDC TransferChecked + Memo transaction with your wallet. Fee payer is sponsored — the agent only needs USDC.
  3. Retry with the PAYMENT-SIGNATURE header — response is 200 with a PAYMENT-RESPONSE settlement receipt.
curl https://bridgenode.cc/v1/chat/completions   -H "Content-Type: application/json"   -d '{"model":"deepseek-flash","messages":[{"role":"user","content":"hello"}],"max_tokens":200}'
# → 402 Payment Required + PAYMENT-REQUIRED header
# sign the partial transaction, then retry with PAYMENT-SIGNATURE header
# → 200 OK + PAYMENT-RESPONSE header

Live prices: /v1/models. Full flow and SDK examples: /llms-full.txt, /skill.md.

MCP setup

Add BridgeNode to any MCP client — one line (stdio wrapper, @bridgenode/mcp):

claude mcp add bridgenode -s user -- npx -y @bridgenode/mcp@latest

Or use the remote server directly (streamable-http) in claude_desktop_config.json / .cursor/mcp.json / .windsurf/mcp.json:

{
  "mcpServers": {
    "bridgenode": {
      "type": "http",
      "url": "https://bridgenode.cc/mcp"
    }
  }
}

Tools: chat_completions (paid, x402 — accepts OpenAI-style tools for agent tool calling), list_models and get_price_estimate (free).

Endpoints

Free models

No payment, no API key, no registration — just send a request with the model id (first request → 200 directly).

Free model notes (read before choosing one):

Models

Full pricing: /models

FAQ

Discovery

SDKs

Community

GitHub Moltbook Discord X

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Pricing · Terms · v1.7.0