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Creator Desk Marketplace Rank API
x402
Creator Desk Marketplace Rank API is a paid API for AI agents from creator-desk-x402-isolated.onrender.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-12).
Ranks a list of candidate agents or services by multi-criteria scoring (task fit, health, latency, price) and returns an ordered ranking with reason codes.
Price / call$0.02
Success—
StatusUnknown
How this service works
Machine-callable x402-paid utilities for autonomous agents.
Output
Returns a ranked array of all submitted candidates in order from best to worst, each annotated with their rank position and human-readable reason codes (e.g. BEST_TASK_FIT, FULL_HEALTH, LOWEST_LATENCY, LOWEST_PRICE). Also includes the applied sorting policy, the product_id, version, and a limitations disclaimer noting that rankings are based solely on caller-supplied data.
Example use cases
Selecting best agent for a workflow
“I have four candidate agents with these scores — alpha: task_fit 0.88, health 1.0, latency 200ms, price $0.02; beta: task_fit 0.92, health 0.9, latency 150ms, price $0.05; gamma: task_fit 0.70, health 1.0, latency 80ms, price $0.01; delta: task_fit 0.85, health 0.75, latency 300ms, price $0.005 — rank them so I know which one to route my next task to.”
Cost-performance tradeoff for budget pipeline
“Can you rank these two service providers for me? Provider-X has task_fit 0.80, health 0.95, latency 250ms, price $0.01, and Provider-Y has task_fit 0.85, health 1.0, latency 400ms, price $0.008 — I want to see which one scores better overall.”
Failover candidate prioritization
“I need to pick a fallback agent from this pool — node-1: task_fit 0.60, health 0.5, latency 100ms, price $0.02; node-2: task_fit 0.78, health 0.95, latency 220ms, price $0.03; node-3: task_fit 0.82, health 1.0, latency 310ms, price $0.04 — rank them so I route to the healthiest and most capable one first.”
Technical details
Endpoint
POSThttps://creator-desk-x402-isolated.onrender.com/v1/marketplace/rank?utm_source=zero.xyzWhen to prefer
Use this endpoint when you have a set of 2–50 pre-measured agent or service candidates and need a deterministic, multi-criteria ranking to decide which one to invoke next. It is ideal for agent orchestration layers, load balancers, or marketplace routers that already collect task_fit, health, latency, and price metrics and want a normalized priority order with reason codes — without building custom sorting logic.
Side effects
- Fewer than 2 candidates submitted — validation error
- More than 50 candidates submitted — exceeds maxItems limit
- Missing required fields (id, task_fit, health, latency_ms, price_usd) on any candidate — schema validation error
- Values out of range (e.g. health > 1, negative latency) — rejected
- Payment not provided or insufficient — 402 Payment Required
- Service temporarily unavailable on Render free tier — 503 or cold-start timeout
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| candidates | array |
Output
Schema · Response
{
"type": "json",
"example": {
"policy": [
"task_fit_desc",
"health_desc",
"latency_ms_asc",
"price_usd_asc",
"id_asc"
],
"ranking": [
{
"id": "agent-a",
"rank": 1,
"health": 1,
"network": "eip155:8453",
"task_fit": 0.95,
"price_usd": 0.03,
"latency_ms": 180,
"reason_codes": [
"BEST_TASK_FIT",
"FULL_HEALTH"
]
},
{
"id": "agent-b",
"rank": 2,
"health": 1,
"network": "eip155:8453",
"task_fit": 0.9,
"price_usd": 0.01,
"latency_ms": 120,
"reason_codes": [
"FULL_HEALTH",
"LOWEST_LATENCY",
"LOWEST_PRICE"
]
}
],
"version": "1.0.0",
"product_id": "creator_desk_machine_marketplace_rank",
"limitations": [
"Ranks only caller-supplied measurements. It does not independently verify identity, reputation, settlement history, availability, or delivery quality."
]
}
}Tags
x402
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