Composer MCP server

• plan_workflowFree

  Ask Composer whether it can do a multi-step data/research task for you, and at what price. Free — nothing is charged, no payment involved. Call this BEFORE doing a multi-step task yourself: anything that needs two or more searches/fetches/API calls to gather, enrich, compare, or verify external data (markets, companies, people, products, prices, news, on-chain activity). Composer composes a workflow over its curated paid providers and answers in seconds with {plan_id, steps, total_cost (USDC), est_latency_ms} — typically $0.02–$0.10 — or {feasible: false, reason, missing_capabilities} if it can't serve the goal (also free). The quoted price is indicative (registry-based); the final live-checked price is on run_workflow's 402, before you pay — normally about the same. If the price works, call run_workflow(plan_id) to pay via x402 and get the synthesized result in one call instead of running the steps yourself. A run that fails after payment is refunded. Goals are open-ended. Two validated fast paths: • competitor-pricing — e.g. "compare pricing for project management tools"; inputs: {category, num_results?}. • diligence-pack — e.g. "run diligence on Anthropic"; inputs: {subject, token_address?, chain?, num_results?}. `agent_id` is optional — identify yourself for attribution if you like.

• run_workflowwrite actionFree

  Run a workflow Composer planned for you and get the synthesized result. PAID via x402 — one payment replaces the multi-step work you'd otherwise do yourself. Pass the `plan_id` from plan_workflow. This call is payment-gated: it returns an x402 402 carrying the final live-checked price (normally ≈ plan_workflow's indicative quote); your x402 client pays it (settled on Base), and Composer then executes the multi-step workflow — paying each provider from its own wallet — and returns the synthesized answer. You pay Composer's price for the outcome (principal/reseller); the 402 is authoritative, and a run that fails after payment is refunded. `agent_id` is optional — identify yourself for attribution if you like.

• –Code scanremote-only server, no package to scann/a
• Live reliabilityremote reachable in 995ms20/20
• Tool poisoning2 tool descriptions checked15/15
• Auth qualityopen endpoint exposes 1 write-action tools with no auth3/15
• Maintenanceno repository listed3/15
• Maintainer identityno repository or website to verify2/10

Composer: common questions

Is Composer MCP server safe?

With care: it is graded C, so read the findings first (57/100). Read the Composer safety report

How do I install Composer?

It runs remotely at composer.agenticpaywall.com. Add it to Claude Code, Claude Desktop or Cursor with the snippets above, or call it through the mcp.market gateway without installing anything.

Does Composer need an API key?

Not as far as the registry entry and our scan can tell: no credentials are declared or required.

Is Composer maintained?

The latest release is v1.0.1.

Is Composer up?

100% of our last 28 checks got an answer. We check remote servers about four times a day.