# OpusIntelligence x402 Service Shortlist

> OpusIntelligence x402 Service Shortlist is a paid API for AI agents from intel.opusai.work, paid per call via x402, $0.01/call, status down (last checked 2026-10-02).

Returns a ranked shortlist of three x402 services from the CDP Bazaar catalogue that best match a stated need, scored on repeat usage, reach, recency, schema quality, and relative price.

## Facts

- Endpoint: GET https://intel.opusai.work/v1/shortlist?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: down
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/opusintelligence-x402-service-shortlist-48719b83
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Rpz3FboDWyHCgq28Aa1Ev

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 opusintelligence-x402-service-shortlist-48719b83
```

Example prompt: Can you find the best x402 service for real-time Twitter/X data — I want to see which one has the most repeat usage and why it ranks above the others?

## When to prefer this

Use this endpoint when an AI agent needs to programmatically discover and compare x402 services for a specific task rather than manually browsing the Bazaar. It is especially valuable when selection criteria include real-world usage signals (repeat payers, call volume) rather than just keyword matching or price alone. Prefer it over manual catalogue browsing or static lists when freshness and empirical adoption matter.

## Known failure modes

- No matching services found for the query — returns empty shortlist with candidates_matched=0
- Vague or ambiguous query produces low-relevance candidates
- CDP Bazaar catalogue may not include very new or unlisted x402 services
- Query too broad returns high-variance results across unrelated service types
- Payment failure (insufficient USDC balance) blocks the call entirely

## How this service works

Ranked shortlist of x402 services for a stated need. Scores every matching resource in the CDP Bazaar catalogue on repeat usage (calls per distinct payer), reach, recency, published-schema quality and price relative to services answering the same query. Returns three candidates with the raw figures, plain-language reasons, and category context. OpusIntelligence excludes its own services from all rankings.

## Output

A JSON object containing: a list of up to three ranked service candidates each with a URL, score (0–1), price in USDC, verdict (e.g. 'strong'), plain-language reasons ('why'), usage signals (calls in 30 days, distinct payers, calls-per-payer ratio), and any watch flags; plus category context such as total candidates matched and best repeat ratio; and a list of any excluded services (e.g. operator's own endpoints).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "q"
     ],
     "properties": {
      "q": {
       "type": "string",
       "description": "What the caller needs, in plain words."
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "query": "real-time twitter data",
  "excluded": [
   {
    "reason": "operator_of_this_endpoint",
    "resource": "https://intel.opusai.work/v1/triad"
   }
  ],
  "shortlist": [
   {
    "why": [
     "125x repeat usage vs 38x for the next candidate"
    ],
    "score": 0.7085,
    "watch": [],
    "signals": {
     "calls_30d": 2125,
     "payers_30d": 17,
     "calls_per_payer": 125
    },
    "verdict": "strong",
    "resource": "https://example.dev/tweet-search",
    "price_usdc": 0.005
   }
  ],
  "set_context": {
   "notes": [
    "Category has at least one well-used service (125x repeat)."
   ],
   "best_repeat_ratio": 125,
   "candidates_matched": 60
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/opusintelligence-x402-service-shortlist-48719b83/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from intel.opusai.work](https://www.zero.xyz/host/intel.opusai.work/llms.txt)