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Delx URL Allowlist Match
x402
Delx URL Allowlist Match 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).
Checks whether a given URL matches any host/path pattern in a caller-supplied allowlist, returning a deterministic JSON result for use in agent preflight egress checks
Price / call$0.001
Success—
StatusUnknown
How this service works
Match a URL against host/path allowlist patterns before egress — first-party local utility for agent preflight and proven micro-utils expansion. Returns deterministic machine-readable JSON for $0.001 USDC via x402 on Base. Execution is first-party, local-only, stateless, and memory-only with no paid upstream, no input retention, no web search, no live RPC, and no mediagen. Results are advisory; the caller owns authorization, budgets, and production controls. Sibling of Delx routes that already…
Output
Returns a deterministic JSON object indicating whether the input URL matched any pattern in the provided allowlist, along with which pattern matched (if any). The response is machine-readable, stateless, and advisory — the caller retains responsibility for final authorization decisions.
Example use cases
Agent egress preflight check
“Before my agent fetches data from 'https://feeds.external.io/prices/btc', verify it against my allowlist patterns ['feeds.external.io/*', 'data.mycompany.com/*'] so I know if it's permitted to proceed.”
Dynamic URL gate in automation pipeline
“My workflow is about to POST to 'https://hooks.slack.com/services/T00/B00/xyz' — can you check that URL against these allowed destinations: ['hooks.slack.com/*', 'api.github.com/*'] before we send anything out?”
Security policy enforcement for LLM tool use
“I want to make sure my AI agent only calls approved endpoints — run 'https://api.openai.com/v1/chat/completions' through my allowlist of ['api.openai.com/*', 'api.anthropic.com/*'] and tell me if it's permitted.”
Technical details
Endpoint
POSThttps://api.delx.ai/api/v1/x402/url-allowlist-matchWhen to prefer
Use this endpoint when an AI agent or automated pipeline needs a fast, stateless, deterministic check of whether a URL is permitted before making an outbound egress call — especially in preflight workflows where no persistent state, web search, or upstream RPC is desired. Prefer this over custom regex logic when you want a paid, auditable, micro-utility call with consistent JSON output. Best suited for single-URL spot checks rather than bulk URL filtering.
Side effects
- Missing or malformed URL input returns a validation error
- Empty or null allowlist array returns no-match result
- Malformed pattern syntax in allowlist may produce unexpected match behavior
- Non-HTTP/HTTPS URL schemes may not match correctly depending on pattern format
- Network or service unavailability returns a 5xx error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| url | string | Input field: url. |
| allowlist | array | Input field: allowlist. |
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true,
"host": "api.delx.ai",
"path": "/api/v1/x402/hash",
"schema": "delx/util-url-allowlist-match/v1",
"scheme": "https",
"allowed": true,
"matched_pattern": "api.delx.ai"
}
}Tags
x402
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