# Delx Base Settlement Receipt Check

> Delx Base Settlement Receipt Check is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).

Validates a Base blockchain settlement receipt against expected recipient address and amount, returning a structured pass/fail verification result.

## Facts

- Endpoint: POST https://api.delx.ai/api/v1/x402/base-settlement-receipt-check
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/delx-base-settlement-receipt-check-4cec4dc3
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_WpvfFq6zcqj6ATqyuctIs

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 delx-base-settlement-receipt-check-4cec4dc3 -d '<json body>'
```

Example prompt: Check this Base settlement receipt for me — the expected recipient is 0xABC...123 and the expected raw amount is 1000000 — I need to know if the chain, recipient, and amount all match before I release the order.

## When to prefer this

Use this endpoint when you need a fast, in-memory preflight check of a Base network settlement receipt without making external blockchain calls. Ideal for x402 payment workflows where you want to confirm recipient address and raw amount correctness before releasing a service or resource. Prefer this over a full on-chain verification when latency matters and you trust the receipt source enough for a preflight gate.

## Known failure modes

- Mismatched receipt format or missing required fields returns validation failure
- Incorrect expected_recipient or expected_amount_raw causes match flags to return false
- Malformed address strings may cause recipient_match to be false even if payment was correct
- onchain_verified may return false if the service only performs preflight checks without querying the chain
- Exceeding maxProperties 128 on the receipt object may cause request rejection

## How this service works

Base Settlement Receipt Check: Base Settlement Receipt Check checks caller-supplied receipt chain, status, recipient, and raw amount from bounded caller-supplied values without an external provider. Call Base Settlement Receipt Check before signing, submitting, replacing, or accepting an EVM/Base transaction assembled from caller-owned data. Returns normalized transaction evidence, calculated budget or shape findings, and a fail-closed preflight status for Base Settlement Receipt Check as versi…

## Output

Returns a JSON object with a 'status' field ('pass'/'fail'), a 'result' object containing boolean flags for chain_match, amount_match, recipient_match, status_success, and onchain_verified, plus an 'evidence' block with the input SHA-256 hash, retained flag (always false), and external_calls count. Also includes the operation name and schema version.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "receipt": {
   "type": "object",
   "description": "Receipt supplied to Base Settlement Receipt Check; used only for this bounded calculation and processed in memory without retention.",
   "maxProperties": 128,
   "additionalProperties": true
  },
  "expected_recipient": {
   "type": "string",
   "maxLength": 8192,
   "description": "Expected Recipient supplied to Base Settlement Receipt Check; used only for this bounded calculation and processed in memory without retention."
  },
  "expected_amount_raw": {
   "type": "string",
   "maxLength": 8192,
   "description": "Expected Amount Raw supplied to Base Settlement Receipt Check; used only for this bounded calculation and processed in memory without retention."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "result": {
   "chain_match": true,
   "amount_match": true,
   "status_success": true,
   "recipient_match": true,
   "onchain_verified": false
  },
  "schema": "delx/util-base-settlement-receipt-check/v1",
  "status": "pass",
  "evidence": {
   "retained": false,
   "input_sha256": "7f5a14a56828aeeef17308408fd528ebad754eaf15b74a541935ea910a050663",
   "external_calls": 0
  },
  "operation": "evm_preflight:base_settlement_receipt_check"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/delx-base-settlement-receipt-check-4cec4dc3/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)