# Verity Suite Compass Pro

> Verity Suite Compass Pro is a paid API for AI agents from suite.veritylayer.dev, paid per call via x402, $0.15/call, status unknown (last checked 2026-09-14).

Accepts a set of candidate options, constraints, and optional evidence, then returns a calibrated verdict (recommend, tentative, gather_more_info, or no_viable_option) with a chosen option and concrete reasons.

## Facts

- Endpoint: POST https://suite.veritylayer.dev/compass/pro
- Price: $0.15/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/verity-suite-compass-pro-242fd3e9
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_OOKTkiaSgiSeNQtPGucct

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 verity-suite-compass-pro-242fd3e9 -d '<json body>'
```

Example prompt: I need to pick between three cloud storage plans — Plan A is $10/mo 100GB, Plan B is $25/mo 500GB, Plan C is $50/mo 2TB — my hard requirement is at least 400GB and I prefer the cheapest option that meets it; can you use Compass Pro to give me a calibrated verdict with the main tradeoff explained?

## When to prefer this

Choose Compass Pro when an AI agent needs a deterministic, auditable, pay-per-call decision over a discrete set of options with explicit constraints — especially when you need a fail-closed verdict (gather_more_info or no_viable_option rather than a hallucinated pick), a confidence score, and a traceable receipt. Prefer this over asking the base LLM directly when accountability, calibration, and structured tradeoff reasoning matter more than latency or cost minimization.

## Known failure modes

- Missing required fields (options, constraints) returns a validation error
- Constraints string exceeds 2000 characters causes rejection
- Evidence string exceeds 2000 character limit
- No viable option among candidates returns no_viable_option verdict with blocking reasons rather than a pick
- Insufficient evidence for current/external facts results in gather_more_info verdict
- Payment failure via x402 protocol blocks the call
- Malformed bodyType or method enum value returns 422

## How this service works

The trust fabric for AI agents — calibrated, fail-closed services agents pay per call.

## Output

Returns a structured object containing a verdict label (recommend, tentative, gather_more_info, or no_viable_option), the chosen option copied verbatim from the input list (when a pick is possible), a confidence score, a list of concrete reasons grounded in the supplied constraints and evidence including the main tradeoff against the runner-up, and a payment receipt object.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "options": {
   "type": "array",
   "items": {
    "type": "string"
   },
   "title": "Options",
   "description": "the candidate choices to pick among; one option per item, stated verbatim as you want it returned"
  },
  "evidence": {
   "anyOf": [
    {
     "type": "string",
     "maxLength": 2000
    },
    {
     "type": "null"
    }
   ],
   "title": "Evidence",
   "default": null,
   "description": "facts known about the options (specs, prices, availability, data); for any current or external fact, only what is stated here may be used"
  },
  "constraints": {
   "type": "string",
   "title": "Constraints",
   "maxLength": 2000,
   "minLength": 1,
   "description": "the goal plus hard requirements (must-meet gates), soft preferences (weigh, don't gate), and any priorities or tradeoffs between them"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/verity-suite-compass-pro-242fd3e9/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from suite.veritylayer.dev](https://www.zero.xyz/host/suite.veritylayer.dev/llms.txt)