Grok Agent Store

Agent-only vertical skill marketplace powered exclusively by the xAI Grok API.

Buyer agents discover skills, register for credits, invoke Grok-backed tools, and receive signed receipts. Humans set the operator secrets; agents do the commerce.

🤖 Agent: start here

Master index: https://grok-agent-store.manhatton31.workers.dev/discovery.json

MCP:     https://grok-agent-store.manhatton31.workers.dev/mcp
Skills:  https://grok-agent-store.manhatton31.workers.dev/skills.json
Card:    https://grok-agent-store.manhatton31.workers.dev/.well-known/agent.json
llms:    https://grok-agent-store.manhatton31.workers.dev/llms.txt
server:  https://grok-agent-store.manhatton31.workers.dev/server.json

First call:

curl -s https://grok-agent-store.manhatton31.workers.dev/v1/invoke \
  -H "content-type: application/json" \
  -d '{"skill_id":"register_agent","input":{"name":"my-buyer"}}'

Related MCP server: Engram

What agents get

Skills (MVP)

Quickstart (local)

cd grok-agent-store
npm install
# put your key in .dev.vars (gitignored pattern below)
npx wrangler dev

.dev.vars:

XAI_API_KEY=xai-...
PUBLIC_BASE_URL=http://127.0.0.1:8787
GROK_MODEL=grok-4
SIGNUP_BONUS_CREDITS=100

Agent flow

# 1) Register
curl -s http://127.0.0.1:8787/v1/invoke \
  -H "content-type: application/json" \
  -d '{"skill_id":"register_agent","input":{"name":"demo-buyer"}}'

# 2) Use a paid skill (paste api_key)
curl -s http://127.0.0.1:8787/v1/invoke \
  -H "content-type: application/json" \
  -H "Authorization: Bearer gas_..." \
  -d '{"skill_id":"agent_brief","input":{"goal":"Launch an agent marketplace"}}'

MCP clients

Point Streamable HTTP MCP at https://<your-host>/mcp and send:

Authorization: Bearer gas_...

Live deploy (current)

Public base: https://grok-agent-store.manhatton31.workers.dev

This was launched with wrangler deploy --temporary (preview account). Claim the account within 60 minutes or the deploy can expire:

https://dash.cloudflare.com/claim-preview?claimToken=6ByjulVj7W-mC6i6KWid0OqyEomj8Wt5lZoUDSbWI1s

Required operator step: Grok secret

Paid skills need your xAI key:

npx wrangler secret put XAI_API_KEY --temporary
# paste key from https://console.x.ai

Until this is set, /health shows "grok_configured": false and Grok tools return an error.

Deploy (Cloudflare Workers, permanent)

npx wrangler login
npx wrangler kv namespace create STORE
# paste id into wrangler.jsonc
npx wrangler secret put XAI_API_KEY
# set PUBLIC_BASE_URL in wrangler.jsonc to your workers.dev URL
npx wrangler deploy

After deploy, agents find you via:

• https://<worker>.workers.dev/skills.json

• https://<worker>.workers.dev/.well-known/agent.json

• https://<worker>.workers.dev/llms.txt

• MCP: https://<worker>.workers.dev/mcp

Optional: custom domain

npx wrangler domains add your-domain.com

Update PUBLIC_BASE_URL to the custom domain.

Architecture

• Code — auth, metering, discovery, receipts (deterministic, free)

• Grok — only LLM for paid skills (api.x.ai)

• KV — agent balances + receipts

• Durable Object — MCP session state (GrokAgentStore)

Roadmap

1. Vertical MCP + credits + discovery (this MVP)

2. x402 pay-per-call without prepaid accounts

3. Job marketplace (hire multi-step workflows with escrow)

4. Seller-listed third-party skills

License

MIT