# Polymarket NBA Market Implied Probability Lookup

> Polymarket NBA Market Implied Probability Lookup is a paid API for AI agents from nba-odds-gap.relayhop.workers.dev, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-14).

Returns the Polymarket implied probability (Yes price) for a specific NBA market by Gamma market ID

## Facts

- Endpoint: GET https://nba-odds-gap.relayhop.workers.dev/v1/nba/odds/pm/553856
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/nba-odds-gap-relayhop-workers-dev-d1bd6843
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_P1Gl4nJgfYrMatoT8yRfY

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 nba-odds-gap-relayhop-workers-dev-d1bd6843
```

Example prompt: What's the current Polymarket implied probability for the NBA championship market with Gamma ID 553856?

## When to prefer this

Use this endpoint when you need the Polymarket-specific implied probability for a known NBA market and already have the Polymarket Gamma market ID. Prefer this over the sibling endpoints when you want raw Polymarket pricing rather than Kalshi odds or the cross-platform divergence comparison.

## Known failure modes

- Invalid or non-existent Gamma market ID returns an error or empty result
- Market no longer active or resolved returns stale or unavailable data
- Polymarket Gamma API downtime causes upstream fetch failure
- Payment not completed results in HTTP 402 rejection

## How this service works

Polymarket NBA market implied probability (Yes price) by Gamma market id. Source: Polymarket Gamma API (free).

## Output

Returns the Polymarket implied probability (Yes price) as a decimal or percentage for the specified NBA Gamma market ID, sourced from the Polymarket Gamma API.

## Example request

```json
{
 "input": {
  "marketId": "553856"
 }
}
```

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "properties": {
    "marketId": {
     "in": "path",
     "type": "string",
     "description": "Polymarket Gamma market id"
    }
   }
  },
  "output": {
   "type": "object"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/nba-odds-gap-relayhop-workers-dev-d1bd6843/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from nba-odds-gap.relayhop.workers.dev](https://www.zero.xyz/host/nba-odds-gap.relayhop.workers.dev/llms.txt)