Cofferline

Reliability

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How to connect

Add it to any MCP client that supports remote servers.

{
  "mcpServers": {
    "cofferline": {
      "type": "http",
      "url": "https://mcp.cofferline.com"
    }
  }
}

47 tools

• get_quotes

  Live venue quote comparison for a token conversion (CoW + ParaSwap on Base). Free, no auth.

• get_benchmarks

  Measured execution benchmarks: median savings vs arrival quote by USD size bucket, from real completed intents only. Free, no auth.

• screen_address

  OFAC SDN counterparty screening for an address. Free, no auth.

• list_tokens

  Tokens the platform accepts on an intent, per chain — what create_intent will admit. Free, no auth.

• list_feedback

  Every feature request ever submitted, public and unauthenticated. Free.

• submit_feedback

  Submit a feature request ($1 anti-spam fee, charged to the prepaid balance when funded). Auth required. Payment flow: call once without x_payment — a 402 reply lists the exact EIP-3009 requirements (amount, USDC asset, recipient, EIP-712 domain). Sign a transferWithAuthorization…

• start_siwe_login

  Start wallet sign-in: returns a single-use SIWE message. Sign it with the wallet outside MCP (this server cannot sign), then call complete_siwe_login. Free, no auth.

• complete_siwe_login

  Finish wallet sign-in: exchanges the signed SIWE message for a cl_sess_… session token — use it as the Authorization bearer on every authenticated tool. Free, no auth.

• get_me

  Identify the authenticated account: address, kind, scopes. Auth required.

• export_account

  Export all of this account's data in one document. Auth required.

• offboard_account

  Close this account for good: revokes every credential, scrubs personal data, retires the account. Irreversible; confirm_wallet_address must be the account's own wallet address, typed exactly. Auth required.

• put_policy

  Create or update the wallet's treasury policy (immutable versioning; PUT creates the next version). Auth required. Body must match /schemas/policy-v1.json — only version, wallet and chain_id are required; omitted fields take the platform defaults published in the manifest and…

• get_policy

  List policy versions, newest first (the first entry is active). Auth required.

• check_spend

  Pre-flight policy check: would this spend be allowed under the wallet's policy right now? Auth required.

• check_pm_order

  Pre-flight policy check for a prediction-market order: would this cost be allowed right now? Auth required.

• poll_events

  Poll typed treasury events with a monotonic cursor (intent lifecycle, budget thresholds, reconciliation, security alerts). Auth required.

• get_statement

  Deterministic monthly statement derived from the append-only ledger — same period, same bytes. Auth required.

• create_intent

  Create a conversion or gas_topup intent; the executor pipeline plans and fills it under policy. Auth required.

• get_intent

  Fetch an intent, including fills and the post-trade report once filled. Auth required.

• list_intents

  List intents, newest first. Auth required.

• cancel_intent

  Cancel a planned intent (a few-second window before execution claims it). Auth required.

• prepare_delegation

  Prepare a scoped session-key grant for a Kernel smart account: exact call allowlist, expiry, optional rate limit. Returns the ONE EIP-712 digest the account owner signs outside MCP (this server cannot sign) — then call confirm_delegation with the signature. Auth required.

• confirm_delegation

  Activate a prepared delegation by supplying the owner's signature over its enable digest. Auth required.

• renew_delegation

  Renew an active delegation: same scope, fresh expiry, no authority gap. Returns a NEW digest to sign and confirm exactly like prepare_delegation. Auth required.

• revoke_delegation

  Revoke a delegation. The reply includes calldata the owner can send on-chain for hard finality. Auth required.

• get_delegation

  Fetch one delegation. Auth required.

• list_delegations

  List delegations, newest first. Auth required.

• panic

  Emergency stop, one call: suspends the account, revokes every API key, session, delegation and venue credential, and returns all unwind calldata for the owner. Auth required.

• get_balance

  Prepaid fee balance: settled credits minus fee debits. Auth required.

• topup_balance

  Top up the prepaid balance with USDC. Auth required. Payment flow: call once without x_payment — a 402 reply lists the exact EIP-3009 requirements (amount, USDC asset, recipient, EIP-712 domain). Sign a transferWithAuthorization for them outside MCP (this server cannot sign)…

• set_auto_topup

  Configure auto-topup: when the prepaid balance falls below threshold_usd, the platform settles one of the pre-signed EIP-3009 authorizations you supply (signed outside MCP — this server cannot sign). Auth required.

• get_auto_topup

  The auto-topup rule and how many pre-signed authorizations remain. Auth required.

• remove_auto_topup

  Remove the auto-topup rule and its unused authorizations. Auth required.

• store_pm_credential

  Store a prediction-market venue credential (verified live against the venue, sealed at rest, material never returned). Polymarket, either shape: signer_private_key + maker (derives API creds), or api_key + secret + passphrase + maker + signer. Auth required.

• list_pm_credentials

  List stored venue credentials — metadata only, never material. Auth required.

• revoke_pm_credential

  Revoke a venue credential; its sealed ciphertext is destroyed. Auth required.

• get_pm_signer_rotation

  Calldata to swap the Polymarket funder Safe's owner to a new EOA — the owner executes it outside MCP (this server cannot sign). Auth required.

• create_pm_order

  Place a prediction-market limit order under policy, signed server-side with the stored credential. Polymarket: condition_id, token_id, action, price_usd (e.g. '0.55'), size_shares. Auth required.

• list_pm_orders

  The credential's resting orders straight from the venue — recover state after a disconnect. Auth required.

• cancel_pm_order

  Cancel one resting prediction-market order. Auth required.

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