CTRL

${var} — Natural-language description of the workflow to build, e.g. DCA 0.005 ETH into USDC every week. Required. If empty, log CTRL_NO_INTENT and exit cleanly (no notify).

CTRL runs on Base mainnet only. It compiles a trigger → action graph into a V3 vault, the wallet signs once — an EIP-5792 batch deploys the vault and registers spending rules — and a Render-hosted keeper polls every ~5s and executes from there. The security boundary is the user's signature at activate-time, not an API key at create-time, so the create + read REST endpoints are anonymous. Activation requires a real wallet session, which the user provides by opening the CTRL activate landing page in their browser.

Read the last 2 days of memory/logs/ so a re-run can reference an existing workflow id instead of provisioning a new one.

Config

• API root = https://ctrl.build/api/mcp. No key required for the endpoints used here.
• Chain = Base mainnet (chainId 8453). Always send "chain": "base" and "network": "mainnet" — CTRL does NOT support Ethereum, Arbitrum, Solana, or any other chain. If the user asks for another chain, log CTRL_CHAIN_UNSUPPORTED and exit before creating anything.
• Sensible defaults the agent should adopt if the user does not state them: per-swap ≤ 0.01 ETH, per-day ≤ 0.1 ETH, slippage ≤ 1% for stable-pair DCA, 15% only for launchpad sniping. Caps are signed at activate-time, never embedded in the workflow body.

Steps

1. Read the live block catalog

CTRL exposes 24 blocks across four categories (triggers, actions, conditions, utilities). Every key under each node's data.config MUST match a fields[].key in the catalog — invented keys are silently dropped by the keeper.

curl -m 10 -s "https://ctrl.build/api/mcp/block-catalog" \
  | jq '{
      triggers:   [.triggers[].id],
      actions:    [.actions[].id],
      conditions: [.conditions[].id],
      utilities:  [.utilities[].id]
    }'

Pick the trigger + action ids that match ${var}. The most common shapes: