# Authorization Scheme Identify

> Authorization Scheme Identify is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-13).

Identifies the authorization scheme present in a caller-supplied HTTP header without validating credentials or contacting any external provider.

## Facts

- Endpoint: POST https://api.delx.ai/api/v1/x402/authorization-scheme-identify
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/authorization-scheme-identify-6099dc18
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_VUFiFhalWS4s_QO-IIh5f

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability authorization-scheme-identify-6099dc18 -d '<json body>'
```

Example prompt: Can you identify the authorization scheme in this HTTP header value — 'Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9...' — without validating or exposing any credentials?

## When to prefer this

Choose this endpoint when you need a deterministic, offline, credential-safe identification of the authorization scheme in a caller-supplied HTTP header before taking any action (caching, redirecting, retrying) on a web response. It is preferable to in-house parsing when you need a versioned, auditable, normalized result without any external provider dependency or credential exposure risk.

## Known failure modes

- Header value exceeds 8192 character limit — request rejected
- Malformed or unparseable header string — advisory status returned with partial evidence
- Missing or empty header field — error or advisory finding returned
- Unrecognized or non-standard scheme — finding returned with advisory status rather than pass

## How this service works

Authorization Scheme Identify: Authorization Scheme Identify identifies an Authorization scheme without exposing or validating credentials from bounded caller-supplied values without an external provider. Call Authorization Scheme Identify before accepting, caching, redirecting, or retrying a caller-supplied web response. Returns normalized web evidence, the computed finding, and an explicit pass or advisory status for Authorization Scheme Identify as versioned deterministic JSON. Price: $0.001…

## Output

Returns versioned deterministic JSON containing normalized web evidence derived from the header, the computed authorization scheme finding (e.g. Bearer, Basic, Digest, etc.), and an explicit pass or advisory status — all processed in-memory without credential retention or external provider calls.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "header": {
   "type": "string",
   "maxLength": 8192,
   "description": "Header supplied to Authorization Scheme Identify; used only for this bounded calculation and processed in memory without retention."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "result": {
   "scheme": "bearer",
   "credential_present": true,
   "credential_redacted": true
  },
  "schema": "delx/util-authorization-scheme-identify/v1",
  "status": "pass",
  "evidence": {
   "retained": false,
   "input_sha256": "69801a4a366ce7b9c8daab76826fd6fa433c35c9f108dd4b62f2fdeb0dcdcd60",
   "external_calls": 0
  },
  "operation": "web_reliability:authorization_scheme_identify"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/authorization-scheme-identify-6099dc18/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.delx.ai](https://www.zero.xyz/host/api.delx.ai/llms.txt)