Gemini Trust Company

Gemini Trust Company Trading API

Authenticated REST endpoints for placing and managing orders. Treat REST order placement as payload reference or a one-off server workflow; for active trading and market making, prefer WebSocket order.place.

GitHub OpenAPI

Operations 4

Each operation below carries the questions people ask an LLM about it and the instructions they give an agent to run it. Generated by API Evangelist overlay

POST /v1/prediction-markets/order Place a prediction market order · Place order #
Ask an LLM
“How do I buy Yes contracts on a prediction market at a limit price?”
“Can I place a stop-limit or maker-only order on a prediction contract?”
Tell an agent
Place a {orderType} order to {side} {quantity} {outcome} contracts of {symbol} at {price}.
Buy {quantity} {outcome} shares of {symbol} at {price}, {timeInForce}.
POST /v1/prediction-markets/order/batch Place up to 20 prediction orders at once · Place a batch of orders #
Ask an LLM
“Can I submit several prediction market orders in a single request?”
“What is the maximum number of orders in one batch?”
Tell an agent
Submit these prediction orders as one batch: {orders}.
Place a batch of up to 20 contract orders: {orders}.
POST /v1/prediction-markets/order/cancel Cancel one prediction market order · Cancel order #
Ask an LLM
“How do I cancel a single prediction market order?”
“What permission does my key need to cancel a contract order?”
Tell an agent destructive · confirm first
Cancel prediction order {orderId}.
Pull my contract order {orderId} off the book.
POST /v1/prediction-markets/order/batch/cancel Cancel up to 20 prediction orders at once · Cancel a batch of orders #
Ask an LLM
“Can I cancel a list of prediction orders in one call?”
“Do batch cancels accept order IDs as strings as well as integers?”
Tell an agent destructive · confirm first
Cancel these prediction orders together: {orderIds}.
Batch-cancel contract orders {orderIds}.

Documentation

📖
Documentation
https://developer.gemini.com/rest-api/rest-api
📖
APIReference
https://developer.gemini.com/rest
📖
Documentation
https://developer.gemini.com/rest-api/prediction-markets
📖
APIReference
https://developer.gemini.com/prediction-markets-spec

Specifications

⚙
OpenAPI
https://raw.githubusercontent.com/api-evangelist/gemini-trust/refs/heads/main/openapi/gemini-trust-trading-api-openapi.yml

Other Resources

🔗
ErrorCatalog
https://raw.githubusercontent.com/api-evangelist/gemini-trust/refs/heads/main/errors/gemini-trust-problem-types.yml
🔗
DataModel
https://raw.githubusercontent.com/api-evangelist/gemini-trust/refs/heads/main/data-model/gemini-trust-data-model.yml

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OpenAPI Specification

gemini-trust-trading-api-openapi.yml Raw ↑ 
openapi: 3.2.0
info:
  title: Gemini Prediction Markets Trading API
  description: 'API for trading prediction market contracts on Gemini.


    **Note:** Only fields documented in this specification are considered stable. Undocumented fields in API responses may change or be removed without notice.'
  version: 1.0.0
  contact:
    name: Gemini API Support
servers:
- url: https://api.gemini.com
  description: Production
- url: https://api.sandbox.gemini.com
  description: Sandbox
tags:


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# Full source: https://raw.githubusercontent.com/api-evangelist/gemini-trust/refs/heads/main/openapi/gemini-trust-trading-api-openapi.yml