# Apex DB Coverage Contract

> Apex DB Coverage Contract is a paid API for AI agents from Apex DB at api.apex-db.org, paid per call via MPP, $0.25/call, status unknown (last checked 2026-09-15).

Returns the dated Apex DB coverage contract describing database release size, source dataset counts, and measured field fill rates for the automotive data catalog.

## Facts

- Endpoint: GET https://api.apex-db.org/v1/coverage
- Price: $0.25/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Provider: Apex DB
- Docs: https://apex-db.org
- Website: https://apex-db.org
- Tags: automotive, vehicles, emissions, specifications, provenance, data, search
- Canonical page: https://www.zero.xyz/c/apex-db-coverage-contract-cfd38516
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_CpKmUsoQPCxB-KXk2r_7M

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 apex-db-coverage-contract-cfd38516
```

Example prompt: Can you pull the Apex DB coverage contract so I can see the current release date, how many vehicle records are in the database, which source datasets are included, and what percentage of fields are actually filled?

## When to prefer this

Use this endpoint when you need to audit or validate the completeness, freshness, and provenance of the Apex DB automotive dataset before relying on it for downstream queries — particularly to check field fill rates, source counts, and release recency.

## Known failure modes

- API unavailable or network timeout — no coverage data returned
- Payment of 0.25 USDC not processed — 402 response blocking access
- Malformed or empty response if the coverage contract has not yet been generated for the current release

## How this service works

Retrieve the dated Apex coverage contract with release size, source counts, and measured field fill.

## Output

A JSON object containing the dated coverage contract for the Apex DB automotive database, including the release date, total record/release size, count of contributing source datasets, and measured fill rates for key fields across the catalog.

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "additionalProperties": true
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/apex-db-coverage-contract-cfd38516/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.apex-db.org](https://www.zero.xyz/host/api.apex-db.org/llms.txt)