blockrun-mcp MCP工具

Prerequisites

• Node.js ≥ 18 (node -v)
• ~$5 USDC on Base or Solana (the server auto-creates a wallet on first run; see Fund your wallet)
• An MCP client: Claude Code, Claude Desktop, Cursor, Windsurf, or ChatGPT Desktop

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Install

Claude Code (recommended)

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

The -s user flag installs globally (available in every project). The -- separator ensures -y is passed to npx, not parsed by claude mcp add.

Claude Desktop — add to claude_desktop_config.json:

{
  "mcpServers": {
    "blockrun": {
      "command": "npx",
      "args": ["-y", "@blockrun/mcp"]
    }
  }
}

Hosted (no install, always latest)

claude mcp add blockrun -s user --transport http https://mcp.blockrun.ai/mcp

Cursor — add to ~/.cursor/mcp.json (macOS / Linux) or %APPDATA%\Cursor\mcp.json (Windows):

{
  "mcpServers": {
    "blockrun": {
      "command": "npx",
      "args": ["-y", "@blockrun/mcp@latest"]
    }
  }
}

Windsurf — same JSON, in: - macOS: ~/.codeium/windsurf/mcp_config.json - Linux: ~/.config/.codeium/windsurf/mcp_config.json - Windows: %APPDATA%\Codeium\windsurf\mcp_config.json

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Key Use Cases

What kinds of questions can Claude (or any LLM agent) answer once BlockRun MCP is installed:

1. Price reads / market data > "What's BTC trading at? Compare with last week's average." → blockrun_price (free) or blockrun_surf path:market/price

2. Prediction-market consensus > "What's Polymarket's odds for the next Fed rate decision?" → blockrun_markets path:polymarket/events + filter

3. On-chain forensics > "This wallet (0xabc...) — what's it labeled as? What does it hold? When did it whale up?" → blockrun_surf paths:wallet/labels/batch, wallet/detail, wallet/net-worth

4. Cited research with sources > "Find the 5 most-cited papers on speculative decoding from the last 90 days. Summarize the dominant approach." → blockrun_exa action:search then contents

5. Image generation with on-image text > "Generate a poster announcing GPT-5.5 on BlockRun, retro-futuristic, with the headline 'NOW LIVE'." → blockrun_image + the image-prompting skill 5-section framework

6. Voice phone-out > "Call +1-415-555-... and confirm the appointment on Friday at 3pm." → blockrun_phone path:voice/call, body: { to, task, from } (provision from first via phone/numbers/buy), then poll voice/call/{call_id}

7. Multi-agent research with budget cap > "Spawn 3 research agents on competing L1 narratives. Cap each at $0.50." → blockrun_wallet delegate × 3 → children call blockrun_chat + blockrun_exa with their agent_id

8. Cross-chain SQL forensics > "Top 10 tokens by DEX volume on Base in the last 24h." → blockrun_surf path:onchain/sql, body: { sql: "SELECT..." }

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Demo

User: What's Polymarket saying about the Fed rate decision next month?

Claude: According to Polymarket, the market currently puts a 73% probability on the Fed holding rates steady at the May meeting, with 24% on a 25bp cut and 3% on a hike. Volume over the last 24h: $2.1M. The "Hold" contract last traded at $0.73. (via blockrun_markets · cost: $0.001)

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User: Find recent papers on speculative decoding and summarize the key approaches

Claude: I found 8 papers from the last 60 days via neural search. The dominant approaches are: (1) draft model selection — smaller models predicting N tokens ahead for the larger model to verify in parallel... (via blockrun_exa · cost: $0.01)

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Showcase

Posters generated through blockrun_image with openai/gpt-image-2. Each is a single API call routed through BlockRun, paid in USDC on Base.

Gallery

Prompts and a worked example for these are in skills/image-prompting/SKILL.md.

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Environment Variables

Chain selection priority (see src/utils/wallet.ts):

1. ~/.blockrun/.chain or ~/.blockrun/payment-chain set to base or solana → explicit preference wins
2. SOLANA_WALLET_KEY env var present → Solana
3. ~/.blockrun/.solana-session exists → Solana
4. Otherwise → Base (~/.blockrun/.session auto-created)

Switching chains:

• Base → Solana: echo solana > ~/.blockrun/.chain, then set SOLANA_WALLET_KEY or create ~/.blockrun/.solana-session
• Solana → Base: echo base > ~/.blockrun/.chain (the existing .session is reused, so it's the same Base wallet)

Some media and paid market-data tools still settle on Base only: blockrun_image, blockrun_music, blockrun_video, and paid stock blockrun_price calls. In Solana mode they fail before creating or charging a Base wallet.

The server also runs a non-blocking npm registry check at startup and prints an Update available notice to stderr when a newer @blockrun/mcp version exists. Upgrade by re-running the install command — no manual npm update needed.

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Why not just use the APIs directly?

One wallet. All sources. No dashboards.

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Troubleshooting

• Insufficient balance / HTTP 402 after retry → Run blockrun_wallet action:"setup". Send USDC on Base (or Solana — see Environment Variables).
• Smart routing (ClawRouter) is not available on Solana → Pass model: or mode: explicitly to blockrun_chat, or switch back to Base with echo base > ~/.blockrun/.chain.
• claude mcp list doesn't show blockrun → Check node -v (must be ≥18). Clear the npx cache: rm -rf ~/.npm/_npx. Re-run the install command from above.
• fetch failed / timeout when checking wallet balance → Base RPC transient outage. The tool already falls through 3 public RPCs; retry after 30s. Persistent failures usually = local proxy / firewall blocking outbound RPC.
• ENOENT: ~/.blockrun/.session → Expected on first run. The server auto-creates the wallet; check stderr for the WALLET_CREATED line confirming the address.
• Video generation timed out (5-min cap) → Upstream Seedance / xAI queue congestion. No charge (payment-on-completion). Retry, or pick a faster model (bytedance/seedance-1.5-pro).
• Music generation timed out (200s cap) → Same pattern. No charge. Retry; if it persists, the upstream model is rate-limited — try off-peak.

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