Check an HSX program or compiled .udl document
composer.check
Accepts HSX source text for server-side compilation or a decoded, compiled .udl object for direct validation. HSX compilation uses catalogRevisionId and the tenant overlay. The operation validates grammar and semantic rules, cross-instrument gate satisfiability, reserve/post/void pairing, refs bindings, money typing of amount binds, provider decision capabilities. warnings lists advice that does not block a freeze, such as an attached money move with no declared economics purpose, and its fix names the economics line to add. The operation leaves the Product unchanged and returns operationId and receiptId for its durable receipt, including when ok is false. Callers: the founder's CLI login, or an agent token with blueprints:read, or a personal access token with blueprints:read.
POST /v1/composer/check
Principal user_session. Idempotency not_required. Environment either.
Input
| Field | In | Type | Description |
|---|---|---|---|
X-Hyperscale-Environment | header | sandbox | live | |
tenantId required | body | string | Organization tenant ID |
catalogRevisionId | body | string | Immutable tenant catalog revision used when the document is HSX source |
document required | body | string | object | An HSX program source string for server-side compilation, or a decoded .udl JSON object that is already compiled. |
Request sample
curl --request POST 'https://hyperscale0.ai/v1/composer/check' \
--header "Authorization: Bearer $HYPERSCALE_API_KEY" \
--header 'X-Hyperscale-Environment: sandbox' \
--header 'Content-Type: application/json' \
--data-raw '{"tenantId":"ten_sandbox_00000000000000000001","document":"program cars \"Cars\"\nobject car \"Cars\" {\n fields { make: text, model: text, year: integer }\n attach sale = escrow.hold { payer: actor, payee: owner, expose fund as sell }\n}"}'Errors
| Code | HTTP | Cause |
|---|---|---|
agent_approval_denied | 403 | A human denied the agent's proposed operation. |
agent_approval_required | 202 | An agent proposed a protected live operation. |
csrf_token_invalid | 403 | A browser session mutation did not carry a current Hyperscale CSRF token. |
environment_mismatch | 403 | The session was issued for sandbox or live and the request targets the other environment. |
internal_error | 500 | Hyperscale hit an unexpected server-side condition and hid internal implementation details from this audience. |
invalid_request | 400 | The request does not match the API reference. |
missing_required_permission | 403 | The signed-in member's current role does not grant the permission required for this operation. |
missing_required_scope | 403 | The credential is valid but does not grant one or more operation scopes. |
not_found | 404 | No Hyperscale route matched the requested path and method. |
product_access_suspended | 403 | The Product is disabled or closed, so its credentials are suspended in every environment. |
product_activation_required | 403 | The live Product or required live capability is not active yet. |
rate_limited | 429 | The credential sent more than its limit in the current 60-second window: 600 requests per API key or session, 1,200 per IP address. Every response carries `x-ratelimit-limit`, `x-ratelimit-remaining` and `x-ratelimit-reset` (Unix seconds). |
request_body_too_large | 413 | The JSON request body exceeded Hyperscale's accepted payload size. |
resource_not_found | 404 | The requested resource does not exist in the credential's visible scope. |
state_conflict | 409 | The operation conflicts with the current durable state of the resource. |
state_constraint_failed | 422 | The request is syntactically valid but violates a business-state constraint. |
tenant_mismatch | 403 | The request mixed tenant-owned identifiers across tenant boundaries. |
tenant_not_found | 404 | The credential resolved to a tenant Hyperscale cannot find. |
unauthorized | 403 | The request did not include a valid Hyperscale bearer credential for this environment. |
agent_token_expired | 401 | The agent token is real, but its grant ended. A grant lasts 30 days, or 7 days unused. `details.expiresAt` holds the date in ISO 8601 and `details.agentName` names the agent. |
agent_token_replaced | 401 | The founder ran `hyperscale agent setup` again for this agent, which replaced this token with a newer one. `details.agentName` names the agent and `details.replacedAt` holds the date. |
device_login_expired | 401 | The bearer is the founder's own device login from `hyperscale auth login`, not an agent token. Its access token lasts an hour and the CLI refreshes it; the login itself ends after 30 days, or 7 days unused. `details.expiresAt` holds when it ended in ISO 8601. |
invalid_credentials | 401 | Hyperscale could not accept the account or credential request. Signup, login, and bearer authentication use one 401 for every case they reject, so the response exposes no credential-specific reason or registered-email verdict. The single exception is a key that is real but homed in the other environment: because the presented secret already matched a stored key, the message names the mismatch instead of leaving a working credential looking unknown. A bearer that matched nothing gets text that fits its prefix (an agent token, a refresh token, a personal access token, a session or no Hyperscale token at all), which says only what the caller sent, never whether a credential like it exists. |
session_expired | 401 | The session behind this request has ended. A console session ends 30 days after sign-in, or after 12 hours with no request. An admin or customer session ends 24 hours after sign-in, or after 15 minutes with no request. A personal access token ends at the `expiresAt` set when it was created. |
session_required | 401 | This operation needs a person signed in through the browser or the `hyperscale` CLI. A Product API key cannot call it. The request carried no session, or its token matched no live session. |
session_revoked | 401 | The session or personal access token behind this request was ended before its expiry. Sign-out, `user.session.revoke`, a password reset, a role change, removal from the team, user suspension and `personal_access_token.revoke` all end sessions. |
tenant_status_forbidden | 409 | The company is suspended or closed, so every credential bound to it is refused, reads included. `details.tenantId` names the company. |