{
  "markdown": "# @connskill/mcp-growth-services\n\nPay-per-call market data and real-world actions for AI agents, from\n**[agent.connskill.com](https://agent.connskill.com)**: keyword volume by location,\nGoogle SERP snapshots (with AI-overview and PAA blocks), site audits with a real crawl,\nbacklinks, competitors, SMS verification numbers, receive-only inboxes, GDPR-compliant\nLLM chat hosted in Germany, and a trust check for other x402 sellers.\n\nNo account, no API key. Each call is paid in **USDC on Base via x402**. Free endpoints\n(quotes, catalogue, status, locations) need no wallet at all.\n\nThis repo ships the same capability in three forms, so any agent can buy:\n\n| Form | For | Install |\n|---|---|---|\n| **MCP server** (`index.mjs`) | Claude Code, Claude Desktop, Cursor, Codex, OpenClaw, Hermes, anything MCP | `npx -y @connskill/mcp-growth-services` |\n| **Skill** (`skills/connskill-growth/`) | Claude Code, Codex, OpenClaw, Hermes (agentskills.io format) | copy the folder or install from this repo |\n| **Standalone script** (`skills/connskill-growth/scripts/x402-call.mjs`) | any agent that can run `node` | `node x402-call.mjs POST /v1/keyword-ideas '{\"keyword\":\"...\"}'` |\n\nTools are generated **live** from the service's `/openapi.json` and `/.well-known/x402`:\n57 endpoints today (34 paid), and new ones appear without a release.\n\n## Payment model\n\n- **Free endpoints** work with no wallet.\n- **Paid endpoints** need `X402_WALLET_KEY`, the private key of a Base wallet holding\n  USDC. `x402-fetch` signs an EIP-3009 authorization per call; the facilitator pays gas.\n  Without a key, paid tools return a clear hint instead of spending anything.\n- **`X402_MAX_USD`** (default `1.00`) caps what any single call may spend.\n\n⚠️ The key can spend real USDC. Use a **dedicated wallet** funded with only what the\nagent may spend. Never a main wallet.\n\n## Install\n\n### Claude Code\n\n```bash\nclaude mcp add connskill-growth -s user -e X402_WALLET_KEY=0x... -e X402_MAX_USD=0.50 -- npx -y @connskill/mcp-growth-services\n```\n\nOr as a plugin with the skill included (asks for the key in its own config, stored in the keychain):\n\n```bash\nclaude plugin marketplace add CONN-SKILL/connskill-growth-mcp\nclaude plugin install connskill-growth@connskill\n```\n\n### Codex\n\n```bash\ncodex mcp add connskill-growth --env X402_WALLET_KEY=0x... --env X402_MAX_USD=0.50 -- npx -y @connskill/mcp-growth-services\n```\n\nSkill only: copy `skills/connskill-growth` to `~/.agents/skills/`.\n\n### Cursor / Claude Desktop (`mcpServers`)\n\n```json\n{\n  \"mcpServers\": {\n    \"connskill-growth\": {\n      \"command\": \"npx\",\n      \"args\": [\"-y\", \"@connskill/mcp-growth-services\"],\n      \"env\": { \"X402_WALLET_KEY\": \"0x...\", \"X402_MAX_USD\": \"0.50\" }\n    }\n  }\n}\n```\n\n### OpenClaw\n\n```bash\nopenclaw mcp add connskill-growth --command npx --arg -y --arg @connskill/mcp-growth-services\n```\n\nSkill: copy `skills/connskill-growth` into `~/.agents/skills/` (or your workspace `skills/`)\nand set `X402_WALLET_KEY` under `skills.entries.connskill-growth.env` in `openclaw.json`.\n\n### Hermes (NousResearch hermes-agent)\n\n```bash\nhermes skills tap add CONN-SKILL/connskill-growth-mcp\nhermes skills install connskill-growth\n```\n\nOr MCP in `~/.hermes/config.yaml` under `mcp_servers:` with `command: npx`,\n`args: [-y, @connskill/mcp-growth-services]`, `env: {X402_WALLET_KEY: ...}`.\n\n### From source\n\n```bash\ngit clone https://github.com/CONN-SKILL/connskill-growth-mcp && cd connskill-growth-mcp && npm install\nnode index.mjs            # MCP over stdio\nnode test-smoke.mjs       # lists tools, calls a free endpoint, checks the paid guard (never spends)\n```\n\n## Environment\n\n| Var | Default | Meaning |\n|---|---|---|\n| `X402_ORIGIN` | `https://agent.connskill.com` | Base URL of the service |\n| `X402_WALLET_KEY` | – | Base private key holding USDC (enables paid calls) |\n| `X402_MAX_USD` | `1.00` | Hard cap per paid call, in USD |\n\n## What it sells (excerpt, prices live in `/.well-known/x402`)\n\n| Endpoint | Price (USDC) |\n|---|---|\n| `POST /v1/keyword-ideas` | 0.03 |\n| `POST /v1/keyword-metrics` (up to 1000 keywords) | 0.15 |\n| `POST /v1/keyword-metrics-multi` (up to 30 locations, one payment) | 0.15 per location |\n| `POST /v1/serp-report` (organic + AI overview, PAA, featured snippet) | 0.10-0.50 |\n| `POST /v1/site-audit` (Labs + backlinks + real on-page crawl) | 1.00 |\n| `POST /v1/trust-check` (vet an x402 seller: live 402, inflow, self-dealing) | 0.05 |\n| `POST /sms/v1/sms-order` (quote first, free) | 0.25-3.00 |\n| `POST /mail/v1/mail-inbox` (7-day receive-only inbox) | 0.50 |\n| `POST /ai/v1/eu-chat` (GDPR, hosted in Germany, tool use) | 0.10 |\n\nSomething missing? `POST /v1/wishlist` is free and read by humans.\n\n## License\n\nMIT. Built by CONNSKILL GmbH & Co. KG, Traunstein, Germany.\n",
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