Venue error reference

Invalid order payload

Machine-readable preflight context for agents that see this venue failure mode.

class
R4_METADATA_READINESS
code
METADATA_MISSING

What preflight checks

Check required market metadata and neg-risk metadata before constructing an order.

Agent instruction

Do not infer missing metadata. Wait for complete public venue metadata or route to INSUFFICIENT_EVIDENCE.

GET /v1/preflight/{venue}/{market_id}
if verdict in ["DO_NOT_ACT", "INSUFFICIENT_EVIDENCE"]:
    do_not_submit()

Operational diagnostics only. No execution, no custody, no order signing, no advice.