# FiatDock Polymarket Prediction Markets Feed

> FiatDock Polymarket Prediction Markets Feed is a paid API for AI agents from fiatdock.com, paid per call via x402, $0.0045/call, status unknown (last checked 2026-10-11).

Returns live Polymarket prediction market data — outcome prices (implied probabilities), 24h and total volume, liquidity, closing dates, and links — searchable by topic or ranked by 24h volume.

## Facts

- Endpoint: GET https://fiatdock.com/v1/markets/prediction?utm_source=zero.xyz
- Price: $0.0045/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/fiatdock-polymarket-prediction-markets-feed-99020109
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Pl1m1AeygyZff1CFLMMUU

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 fiatdock-polymarket-prediction-markets-feed-99020109
```

Example prompt: Pull the top 5 Polymarket prediction markets about bitcoin right now — I want to see the current implied probabilities, 24h volume, and when they close.

## When to prefer this

Choose this endpoint when you need real-time Polymarket prediction market data — current implied probabilities, volume, and liquidity — for any topic. Ideal for agents doing event probability research, market sentiment analysis, or tracking what traders are betting on. Prefer this over general news APIs when you want crowd-sourced probability estimates with financial skin in the game. The 404-is-free guarantee makes broad topic searches risk-free.

## Known failure modes

- 404 returned (and not charged) when a search query matches no open Polymarket markets
- Query too long (>120 characters) returns a validation error
- Limit out of range (not 1–50) returns a validation error
- Payment failure via x402 if USDC balance is insufficient
- Polymarket data temporarily unavailable causing upstream errors

## How this service works

Live Polymarket markets: each outcome's price (the market's implied probability), 24h and total volume, liquidity, closing date and link. Search by topic (bitcoin, fed rates, election…) or send {} for the markets with the most 24h volume. A search with no open market is 404 and not charged. Pay-per-call via x402.

## Output

A list of open Polymarket markets matching the query (or top by 24h volume if no query), each including: outcome names with their current prices (implied probabilities 0–1), 24h volume, total volume, available liquidity, market closing/resolution date, and a direct link to the market on Polymarket.

## 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"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [],
     "properties": {
      "limit": {
       "type": "integer",
       "example": 10,
       "maximum": 50,
       "minimum": 1,
       "description": "How many markets, 1-50, default 10"
      },
      "query": {
       "type": "string",
       "example": "bitcoin",
       "maxLength": 120,
       "description": "What to look for (e.g. bitcoin, fed rates, election). Omit for the markets with the most 24h volume"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/fiatdock-polymarket-prediction-markets-feed-99020109/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from fiatdock.com](https://www.zero.xyz/host/fiatdock.com/llms.txt)