# Delx Field Coverage

> Delx Field Coverage is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-13).

Measures per-field presence rates across a bounded array of JSON records, returning deterministic coverage statistics for each field.

## Facts

- Endpoint: POST https://api.delx.ai/api/v1/x402/field-coverage
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/delx-field-coverage-7fb3e9e8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_mDD-wdPeV5pgTH29MxWuv

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-field-coverage-7fb3e9e8 -d '<json body>'
```

Example prompt: Check field coverage across these JSON records and tell me which fields are missing or sparse — I want to know the presence rate per field before I push this data to production.

## When to prefer this

Use this endpoint when you need a fast, stateless, deterministic audit of field completeness across a bounded JSON dataset as a preflight step before downstream data, policy, or integration decisions. Prefer it over custom scripts when you need machine-readable coverage output without storing or transmitting data to a third-party analytics platform.

## Known failure modes

- Empty records array returns zero coverage results or an error
- Deeply nested JSON fields may only be measured at top-level unless flattening is applied
- Malformed JSON records may cause parsing errors or be skipped
- Very large record arrays may hit size limits
- Payment failure via x402 prevents execution

## How this service works

Measure per-field presence across bounded JSON records. Use it as a bounded preflight or analysis step inside an enterprise agent workflow before data, policy, integration, security, or commercial decisions reach production. Returns deterministic machine-readable JSON for $0.003 USDC via x402 on Base. Execution is first-party, local-only, stateless, memory-only, and has no paid upstream or input retention. Results are advisory; the caller remains responsible for authorization and production con…

## Output

Returns a deterministic machine-readable JSON object with per-field statistics across the input records, including presence counts, total records, and coverage percentages for each field observed in the dataset.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "records": {
   "type": "array",
   "description": "Input field: records."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "fields": {
   "id": {
    "present": 2,
    "coverage_percent": 100
   },
   "email": {
    "present": 1,
    "coverage_percent": 50
   }
  },
  "schema": "delx/util-field-coverage/v1",
  "record_count": 2
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/delx-field-coverage-7fb3e9e8/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)