@connskill/mcp-growth-services

Pay-per-call market data and real-world actions for AI agents, from agent.connskill.com: keyword volume by location, Google SERP snapshots (with AI-overview and PAA blocks), site audits with a real crawl, backlinks, competitors, SMS verification numbers, receive-only inboxes, GDPR-compliant LLM chat hosted in Germany, and a trust check for other x402 sellers.

No account, no API key. Each call is paid in USDC on Base via x402. Free endpoints (quotes, catalogue, status, locations) need no wallet at all.

This repo ships the same capability in three forms, so any agent can buy:

Form	For	Install
MCP server (`index.mjs`)	Claude Code, Claude Desktop, Cursor, Codex, OpenClaw, Hermes, anything MCP	`npx -y @connskill/mcp-growth-services`
Skill (`skills/connskill-growth/`)	Claude Code, Codex, OpenClaw, Hermes (agentskills.io format)	copy the folder or install from this repo
Standalone script (`skills/connskill-growth/scripts/x402-call.mjs`)	any agent that can run `node`	`node x402-call.mjs POST /v1/keyword-ideas '{"keyword":"..."}'`

Tools are generated live from the service's /openapi.json and /.well-known/x402: 57 endpoints today (34 paid), and new ones appear without a release.

Payment model

Free endpoints work with no wallet.
Paid endpoints need X402_WALLET_KEY, the private key of a Base wallet holding USDC. x402-fetch signs an EIP-3009 authorization per call; the facilitator pays gas. Without a key, paid tools return a clear hint instead of spending anything.
X402_MAX_USD (default 1.00) caps what any single call may spend.

⚠️ The key can spend real USDC. Use a dedicated wallet funded with only what the agent may spend. Never a main wallet.

Install

Claude Code

claude mcp add connskill-growth -s user -e X402_WALLET_KEY=0x... -e X402_MAX_USD=0.50 -- npx -y @connskill/mcp-growth-services

Or as a plugin with the skill included (asks for the key in its own config, stored in the keychain):

claude plugin marketplace add CONN-SKILL/connskill-growth-mcp
claude plugin install connskill-growth@connskill

Codex

codex mcp add connskill-growth --env X402_WALLET_KEY=0x... --env X402_MAX_USD=0.50 -- npx -y @connskill/mcp-growth-services

Skill only: copy skills/connskill-growth to ~/.agents/skills/.

Cursor / Claude Desktop (`mcpServers`)

{
  "mcpServers": {
    "connskill-growth": {
      "command": "npx",
      "args": ["-y", "@connskill/mcp-growth-services"],
      "env": { "X402_WALLET_KEY": "0x...", "X402_MAX_USD": "0.50" }
    }
  }
}

OpenClaw

openclaw mcp add connskill-growth --command npx --arg -y --arg @connskill/mcp-growth-services

Skill: copy skills/connskill-growth into ~/.agents/skills/ (or your workspace skills/) and set X402_WALLET_KEY under skills.entries.connskill-growth.env in openclaw.json.

Hermes (NousResearch hermes-agent)

hermes skills tap add CONN-SKILL/connskill-growth-mcp
hermes skills install connskill-growth

Or MCP in ~/.hermes/config.yaml under mcp_servers: with command: npx, args: [-y, @connskill/mcp-growth-services], env: {X402_WALLET_KEY: ...}.

From source

git clone https://github.com/CONN-SKILL/connskill-growth-mcp && cd connskill-growth-mcp && npm install
node index.mjs            # MCP over stdio
node test-smoke.mjs       # lists tools, calls a free endpoint, checks the paid guard (never spends)

Environment

Var	Default	Meaning
`X402_ORIGIN`	`https://agent.connskill.com`	Base URL of the service
`X402_WALLET_KEY`	–	Base private key holding USDC (enables paid calls)
`X402_MAX_USD`	`1.00`	Hard cap per paid call, in USD

What it sells (excerpt, prices live in `/.well-known/x402`)

Endpoint	Price (USDC)
`POST /v1/keyword-ideas`	0.03
`POST /v1/keyword-metrics` (up to 1000 keywords)	0.15
`POST /v1/keyword-metrics-multi` (up to 30 locations, one payment)	0.15 per location
`POST /v1/serp-report` (organic + AI overview, PAA, featured snippet)	0.10-0.50
`POST /v1/site-audit` (Labs + backlinks + real on-page crawl)	1.00
`POST /v1/trust-check` (vet an x402 seller: live 402, inflow, self-dealing)	0.05
`POST /sms/v1/sms-order` (quote first, free)	0.25-3.00
`POST /mail/v1/mail-inbox` (7-day receive-only inbox)	0.50
`POST /ai/v1/eu-chat` (GDPR, hosted in Germany, tool use)	0.10

Something missing? POST /v1/wishlist is free and read by humans.

License

MIT. Built by CONNSKILL GmbH & Co. KG, Traunstein, Germany.

connskill growth mcp