ZV-2026-0036 · 2026-08-14 · engine-production-3bdc.up.railway.app
engine-production-3bdc.up.railway.app: New required field beta_access_code on signup; requests without it will fail.
breaking
What changed
New required field beta_access_code on signup; requests without it will fail. Field idempotency_key on signup is now required. Type of idempotency_key on signup changed unset → string.
What to do
If your agents call engine-production-3bdc.up.railway.app, pin the new snapshot, patch the affected call sites, and let a green contract check confirm the fix. If you don't use the changed tools, nothing is required, but the rest of the ecosystem just learned about it at the same moment you did.
The redline
− beta_access_code New required field beta_access_code on signup; requests without it will fail. − idempotency_key Field idempotency_key on signup is now required. − unset + string signup − Get a Stripe hosted-checkout link for a credit pack. You never touch a card (WP-PAY). … + Get a hosted-checkout link outside beta. Disabled while beta pricing is free. Whe… create_checkout + request_limit Field request_limit was added to get_account output. + requests_remaining Field requests_remaining was added to get_account output. + requests_used Field requests_used was added to get_account output. + tier Field tier was added to get_account output. + unlimited Field unlimited was added to get_account output. − The machine-readable price list, with per-mode expected_wait. Free, no auth. Retu… + The machine-readable price list, with per-mode expected_wait. Free, no auth. Ever… pricing + beta Field beta was added to pricing output. − Create an account and return your API key exactly once. No auth needed. The entry… + Redeem a private-beta code and create an account. No API key needed. Standard cod… signup + idempotency_key Default of idempotency_key on signup changed null → unset. + request_limit Field request_limit was added to signup output. + requests_remaining Field requests_remaining was added to signup output. + requests_used Field requests_used was added to signup output. + tier Field tier was added to signup output. + unlimited Field unlimited was added to signup output. − Top up your credit balance (1-10000). Self-serve by default. When VHGENGINE_ADMIN… + Compatibility credit grant (1-10000); beta customer operations are already free. … add_credits − Score any hook text on 5 dimensions with rewrite tips. 1 credit. Deterministic he… + Score any hook text on 5 dimensions with rewrite tips. Free during beta. Determin… score_hook − Score many hooks ranked with `best`, or compare named SETS. 1 credit per text. Al… + Score many hooks ranked with `best`, or compare named SETS. Free during beta. All… score_hooks_batch