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Agent Delivery Order Check
x402
Agent Delivery Order Check 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).
Validates that delivered identifiers match the expected order from caller-supplied lists, returning acceptance/rejection status with mismatch reasons and normalized evidence.
Price / call$0.001
Success—
StatusUnknown
How this service works
Agent Delivery Order Check: Agent Delivery Order Check checks delivered identifiers against expected order from bounded caller-supplied values without an external provider. Call Agent Delivery Order Check before paying for or accepting an x402 or agent delivery assembled from caller-supplied challenge and result metadata. Returns contract-specific checks, normalized evidence, mismatch reasons, and an explicit acceptance or rejection status for Agent Delivery Order Check as versioned determinist…
Output
Returns an explicit acceptance or rejection status, contract-specific validation checks, normalized evidence derived from the ID comparison, and a list of mismatch reasons explaining any discrepancies between expected and delivered identifier sequences. All processing is in-memory with no data retention.
Example use cases
Pre-payment delivery order validation
“Before I release payment for this x402 agent result, verify that the delivered IDs ["step-a", "step-b", "step-c"] are in the same order as the expected IDs ["step-a", "step-b", "step-c"] and tell me whether to accept or reject the delivery.”
Detecting mismatched agent output sequence
“The agent returned results with IDs ["doc-3", "doc-1", "doc-2"] but I expected them in order ["doc-1", "doc-2", "doc-3"] — can you check if these match and give me the mismatch reasons?”
Automated pipeline delivery gate
“As part of my agent pipeline, check whether the delivered task IDs ["batch-10", "batch-11"] match the expected sequence ["batch-10", "batch-11"] before I accept the assembled result — return the acceptance status and any evidence.”
Technical details
Endpoint
POSThttps://api.delx.ai/api/v1/x402/agent-delivery-order-checkWhen to prefer
Use this endpoint as a deterministic preflight check before accepting or paying for any agent delivery or x402 transaction where identifier ordering matters. It is purpose-built for in-memory, bounded, stateless order validation without external dependencies, making it ideal for agentic workflows that need fast, auditable accept/reject decisions on caller-supplied challenge and result metadata. Prefer this over building custom comparison logic when you need normalized evidence and explicit mismatch reasons for downstream audit trails.
Side effects
- Mismatched array lengths between expected_ids and delivered_ids causing rejection
- IDs present in delivered list but absent from expected list flagged as mismatches
- Out-of-order delivery detected and rejection status returned with specific mismatch reasons
- Input arrays exceeding 256 items or individual ID strings exceeding 8192 characters rejected
- Malformed or missing required fields resulting in validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| expected_ids | array | Expected Ids supplied to Agent Delivery Order Check; used only for this bounded calculation and processed in memory without retention. |
| delivered_ids | array | Delivered Ids supplied to Agent Delivery Order Check; used only for this bounded calculation and processed in memory without retention. |
Output
Schema · Response
{
"type": "json",
"example": {
"result": {
"ordered": true,
"mismatch_indices": []
},
"schema": "delx/util-agent-delivery-order-check/v1",
"status": "pass",
"evidence": {
"retained": false,
"input_sha256": "a93e772f45da3b48859f4f1c6900055e9082a49385a4800eba45a2117e40c3a3",
"external_calls": 0
},
"operation": "delivery_contract:agent_delivery_order_check"
}
}Tags
x402
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