# Payment Route Selector

> Payment Route Selector is a paid API for AI agents from phion.systems, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-14).

Rejects impossible or unsafe x402 payment routes, ranks eligible routes by policy, and returns a directly executable next payment action

## Facts

- Endpoint: POST https://phion.systems/v1/paid/trust/payment-route-selector
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/payment-route-selector-e02293ef
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_uBtPxobmuuZ4R41AXI8lJ

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 payment-route-selector-e02293ef -d '<json body>'
```

Example prompt: I have several possible x402 payment routes for this transaction — can you evaluate them against my routing policy, filter out any that are unsafe or impossible, and give me the one I should execute next?

## When to prefer this

Use this endpoint when an agent must choose among multiple x402 payment routes and needs deterministic, policy-driven selection rather than ad-hoc logic. Prefer it over custom routing code when safety rejection and explicit policy ranking are both required before executing a payment. Especially valuable in agentic pipelines where a bad route choice could result in failed or unsafe transactions.

## Known failure modes

- All candidate routes rejected as unsafe or impossible — no executable action returned
- Malformed or missing route data causes validation failure
- Policy configuration missing or ambiguous, preventing ranking
- Route ranking ties with no deterministic tiebreaker defined
- Upstream x402 protocol version mismatch with submitted routes

## How this service works

Reject impossible or unsafe x402 routes, rank eligible routes by explicit policy, and return a directly executable next action

## Output

A ranked list of eligible x402 payment routes with unsafe or impossible routes filtered out, plus a directly executable next-action payload indicating which route the agent should use to proceed with the payment.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/payment-route-selector-e02293ef/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from phion.systems](https://www.zero.xyz/host/phion.systems/llms.txt)