Check normalized username availability without reserving the name.
POST /api/v1/me/username-availability. Check normalized username availability without reserving the name.
Request
POST /api/v1/me/username-availability
Authentication is required. Supported credentials: a signed-in customer session token in Authorization: Bearer …. This route does not accept customer API keys.
Parameters
| Name | In | Type | Required | Constraints | Description |
|---|---|---|---|---|---|
X-Service-Act-As | header | string | No | min length: 3; max length: 512 | Service-principal path only (local and devnet stages; refused by configuration on mainnet). With an OAuth client-credentials bearer token from the validator, names the allow-listed Party the client acts as. Missing: 400 SERVICE_ACT_AS_REQUIRED; not allow-listed: 403 SERVICE_PARTY_NOT_ALLOWED. Ignored for customer session tokens. |
X-Request-Id | header | string | No | min length: 8; max length: 128; pattern: ^[A-Za-z0-9._:-]+$ | Optional client correlation identifier. The server always generates a separate authoritative request ID and retains a valid supplied value only as secondary audit correlation metadata. |
Request body
A body is required.
Content type: application/json
Type: object.
| Field | Type | Required | Constraints | Description |
|---|---|---|---|---|
username | string | Yes | max length: 128 | — |
Additional fields are not allowed.
cURL
Create request.json using the request-body schema. The example sends the file bytes unchanged.
curl --fail-with-body --silent --show-error \
--request POST \
--url "https://launch-api.supanova.app/api/v1/me/username-availability" \
--header "Authorization: Bearer $SUPANOVA_SESSION_TOKEN" \
--header "Content-Type: application/json" \
--data-binary @request.jsonResponses
200
Advisory availability; PATCH /me resolves concurrent claims authoritatively.
| Header | Type | Description |
|---|---|---|
X-Request-Id | string | Server-generated request correlation identifier to retain for support and reconciliation. |
Content type: application/json
Type: object.
| Field | Type | Required | Constraints | Description |
|---|---|---|---|---|
available | boolean | Yes | — | — |
policyVersion | "profile-identity-v2" | Yes | — | — |
reason | string | Yes | allowed: "available", "current", "invalid_format", "invalid_length", "reserved", "taken" | — |
username | string | Yes | — | — |
Additional fields are not allowed.
400
The request is malformed or failed validation. Codes: VALIDATION_FAILED, AMBIGUOUS_CREDENTIALS, SERVICE_ACT_AS_REQUIRED.
| Header | Type | Description |
|---|---|---|
X-Request-Id | string | Server-generated request correlation identifier to retain for support and reconciliation. |
Content type: application/json
Standard envelope: error.code, error.message, optional error.details, and requestId. See error handling and the full code registry.
401
Credentials are missing, malformed, expired or revoked. Codes: AUTHENTICATION_REQUIRED, INVALID_AUTHORIZATION_HEADER, INVALID_ACCESS_TOKEN, SESSION_REVOKED.
| Header | Type | Description |
|---|---|---|
X-Request-Id | string | Server-generated request correlation identifier to retain for support and reconciliation. |
Content type: application/json
Standard envelope: error.code, error.message, optional error.details, and requestId. See error handling and the full code registry.
403
The credential may not call this route. Codes: ACCOUNT_RESTRICTED, ANONYMOUS_ACCOUNT_NOT_ALLOWED, API_KEY_ROUTE_NOT_ALLOWED, SERVICE_PARTY_NOT_ALLOWED, SERVICE_PRINCIPAL_NOT_ALLOWED, SIGNUP_NOT_INVITED.
| Header | Type | Description |
|---|---|---|
X-Request-Id | string | Server-generated request correlation identifier to retain for support and reconciliation. |
Content type: application/json
Standard envelope: error.code, error.message, optional error.details, and requestId. See error handling and the full code registry.
413
The request body exceeds the size limit.
| Header | Type | Description |
|---|---|---|
X-Request-Id | string | Server-generated request correlation identifier to retain for support and reconciliation. |
Content type: application/json
Standard envelope: error.code, error.message, optional error.details, and requestId. See error handling and the full code registry.
428
The signed-in account must accept the current product terms first. Codes: PRODUCT_LEGAL_ACCEPTANCE_REQUIRED.
| Header | Type | Description |
|---|---|---|
X-Request-Id | string | Server-generated request correlation identifier to retain for support and reconciliation. |
Content type: application/json
Standard envelope: error.code, error.message, optional error.details, and requestId. See error handling and the full code registry.
429
The caller exceeded an IP or principal request budget.
| Header | Type | Description |
|---|---|---|
Retry-After | integer | Whole seconds to wait before retrying a rate-limited request. |
X-Request-Id | string | Server-generated request correlation identifier to retain for support and reconciliation. |
Content type: application/json
Standard envelope: error.code, error.message, optional error.details, and requestId. See error handling and the full code registry.
503
A dependency is unavailable or the feature is not enabled on this deployment. Codes: AUTHENTICATION_UNAVAILABLE, AUTHORIZATION_UNAVAILABLE.
| Header | Type | Description |
|---|---|---|
X-Request-Id | string | Server-generated request correlation identifier to retain for support and reconciliation. |
Content type: application/json
Standard envelope: error.code, error.message, optional error.details, and requestId. See error handling and the full code registry.
default
Machine-readable API error. The HTTP status identifies the error class.
| Header | Type | Description |
|---|---|---|
X-Request-Id | string | Server-generated request correlation identifier to retain for support and reconciliation. |
Content type: application/json
Standard envelope: error.code, error.message, optional error.details, and requestId. See error handling and the full code registry.
Source contract
This page is generated from the checked-in customer OpenAPI snapshot. Download JSON, download YAML, or compare the live API reference. Snapshot provenance records the retrieval date and checksum.