List the venues this Signer can sign trades for. Returns the venue id, asset class (perp / spot / margin), and auth scheme (hmac / eip712 / ed25519). Read-only static manifest — does NOT need the Signer gateway to be reachable. Call this first to discover what's signable.

Return the Signer enclave's AWS Nitro attestation document (PCR0, PCR1, PCR2 measurements + AWS-issued signature). This proves the code currently signing your orders matches the published source. The enclave's signing key NEVER leaves attested code. Verify the PCR0 against https://usenami.io/signer/attestations before trusting any place_order.

Return equity, free margin, and open positions for a venue. Read-only (does not sign anything that mutates state). Use BEFORE place_order to confirm the account has margin. Requires SIGNER_API_TOKEN.

Place a single order on the named venue. The Signer enclave will sign the venue-native payload using a key that has never been exported. Policy enforced server-side: orders that exceed per-asset caps are rejected by the enclave before signing. Returns the venue's order_id on success. Side effect: real or testnet trade depending on venue env.

Cancel an outstanding order by its venue order_id. Signed inside the enclave just like place_order. Returns the cancellation receipt from the venue. Idempotent: cancelling a non-existent / already-filled order returns ok=false with a reason from the venue.