# Bounty Engineer Capability Fit Matrix

> Bounty Engineer Capability Fit Matrix is a paid API for AI agents from bounty-engineer-x402-prod.onrender.com, paid per call via x402, $0.015/call, status unknown (last checked 2026-10-12).

Given a list of agent/API candidates and a set of required capability labels, returns a match matrix showing which candidates satisfy which requirements, their coverage ratio, and price.

## Facts

- Endpoint: POST https://bounty-engineer-x402-prod.onrender.com/v1/capability-fit-matrix?utm_source=zero.xyz
- Price: $0.015/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/bounty-engineer-capability-fit-matrix-d0ae5e42
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_MVNaKIGgjDtujjcxjahRU

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 bounty-engineer-capability-fit-matrix-d0ae5e42 -d '<json body>'
```

Example prompt: I have three API candidates — alpha, beta, and gamma — and I need to find out which ones fully support 'web-research' and 'json-output'. Can you run a capability fit matrix against those requirements and tell me which candidates are fully compatible and what each costs?

## When to prefer this

Use this endpoint when you need to programmatically select among multiple API or agent candidates based on a declared set of required capabilities, especially when cost and coverage ratio matter for routing decisions. Prefer this over manual comparison when you have more than two candidates or more than three requirements. It is not a runtime verifier — use it for pre-selection and routing logic, not for guaranteeing actual capability performance.

## Known failure modes

- Candidates array is empty or exceeds 100 items — validation error
- Requirements array is empty or exceeds 60 items — validation error
- Candidate lacks declared capability labels — matched array will be empty, coverage_ratio will be 0
- Capability label mismatch due to non-normalized strings — requirements must match exact normalized labels
- Service unavailable on Render cold-start — may timeout on first request

## How this service works

Machine-buyable infrastructure for autonomous agents: API cost routing, margin optimization, funding-rate data, webpage extraction, result verification, spend controls, retry planning, state, tender search and GitHub bounty intelligence.

## Output

Returns a JSON object with per-candidate match results including: which requirements are matched, which are missing, price in USD, coverage ratio (0–1), and p95 latency if available. Also includes a top-level list of fully compatible candidates and the total requirement count. Note: matching is based on declared capability labels only and does not verify actual runtime capability.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "candidates": {
   "type": "array",
   "maxItems": 100,
   "minItems": 1
  },
  "requirements": {
   "type": "array",
   "items": {
    "type": "string"
   },
   "maxItems": 60,
   "minItems": 1
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true,
  "mode": "capability_fit_matrix",
  "candidates": [
   {
    "id": "alpha",
    "matched": [
     "web-research",
     "json-output"
    ],
    "missing": [],
    "price_usd": 0.05,
    "coverage_ratio": 1,
    "p95_latency_ms": null,
    "capability_count": 2
   },
   {
    "id": "beta",
    "matched": [
     "json-output"
    ],
    "missing": [
     "web-research"
    ],
    "price_usd": 0.01,
    "coverage_ratio": 0.5,
    "p95_latency_ms": null,
    "capability_count": 1
   }
  ],
  "limitations": [
   "Matches normalized declared capability labels exactly. It does not verify that a candidate actually possesses or performs the capability."
  ],
  "fully_compatible": [
   "alpha"
  ],
  "requirement_count": 2
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/bounty-engineer-capability-fit-matrix-d0ae5e42/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from bounty-engineer-x402-prod.onrender.com](https://www.zero.xyz/host/bounty-engineer-x402-prod.onrender.com/llms.txt)