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Kalshi

Kalshi communications API

Request-for-quote (RFQ) endpoints

Documentation Provider Profile APIs.io OpenAPI GitHub

Kalshi communications API is one of 21 APIs that Kalshi publishes on the APIs.io network, described by a machine-readable OpenAPI specification.

Tagged areas include Communications. The published artifact set on APIs.io includes an OpenAPI specification and API documentation.

This API exposes 11 operations across 7 paths, and defines 18 schemas. It is described by OpenAPI 3.2.0, at version 3.19.0.

Requests are made against 4 base URLs: https://external-api.kalshi.com/trade-api/v2, https://api.elections.kalshi.com/trade-api/v2, https://external-api.demo.kalshi.co/trade-api/v2, https://demo-api.kalshi.co/trade-api/v2.

11 operations 7 paths 18 schemas 2 DELETE5 GET2 POST2 PUT

Metadata

The identity and technical contract details declared by the specification.

Specification
OpenAPI 3.2.0
API Version
3.19.0
Base URL
https://api.elections.kalshi.com/trade-api/v2
Authentication
API Key, API Key, API Key
Resource Areas
1

Authentication & Security 3

Kalshi communications API declares 3 security schemes for authenticating requests. An API key is passed in the header as KALSHI-ACCESS-KEY (kalshiAccessKey). An API key is passed in the header as KALSHI-ACCESS-SIGNATURE (kalshiAccessSignature). An API key is passed in the header as KALSHI-ACCESS-TIMESTAMP (kalshiAccessTimestamp).

  • kalshiAccessKey — Your API key ID
  • kalshiAccessSignature — RSA-PSS signature of the request
  • kalshiAccessTimestamp — Request timestamp in milliseconds

Paths & Operations 11

Across 7 paths, the API surfaces 11 operations — 2 DELETE, 5 GET, 2 POST, 2 PUT. Each is listed below with its method, path, parameters, and response codes.

communications 11

Request-for-quote (RFQ) endpoints

GET
/communications/id
Get Communications ID
GetCommunicationsID → 200401500
GET
/communications/rfqs
Get RFQs
GetRFQs 8 params → 200401500
POST
/communications/rfqs
Create RFQ
CreateRFQ body → 201400401409500
GET
/communications/rfqs/{rfq_id}
Get RFQ
GetRFQ 1 param → 200401404500
DELETE
/communications/rfqs/{rfq_id}
Delete RFQ
DeleteRFQ 1 param → 204401404500
GET
/communications/quotes
Get Quotes
GetQuotes 11 params → 200401500
POST
/communications/quotes
Create Quote
CreateQuote body → 201400401500
GET
/communications/quotes/{quote_id}
Get Quote
GetQuote 1 param → 200401404500
DELETE
/communications/quotes/{quote_id}
Delete Quote
DeleteQuote 1 param → 204401404500
PUT
/communications/quotes/{quote_id}/accept
Accept Quote
AcceptQuote 1 param body → 204400401404500
PUT
/communications/quotes/{quote_id}/confirm
Confirm Quote
ConfirmQuote 1 param body → 204401404500

Schemas 18

The contract defines 18 schemas that model the data the API accepts and returns. The most detailed are Quote (28 properties), RFQ (15 properties), CreateRFQRequest (9 properties), CreateQuoteRequest (6 properties). Each schema is shown below with its type and property counts.

GetCommunicationsIDResponse
object
1 property 1 required
FixedPointDollars
string
US dollar amount as a fixed-point decimal string with up to 6 decimal places of precision. This is the maximum supported precision; valid quote intervals for a…
EmptyResponse
object
An empty response body
RFQ
object
15 properties 6 required
ErrorResponse
object
4 properties
CreateQuoteRequest
object
6 properties 4 required
CreateQuoteResponse
object
1 property 1 required
FixedPointCount
string
Fixed-point contract count string (2 decimals, e.g., "10.00"; referred to as "fp" in field names). Requests accept 0–2 decimal places (e.g., "10", "10.0", "10.…
GetQuoteResponse
object
1 property 1 required
GetRFQResponse
object
1 property 1 required
GetRFQsResponse
object
2 properties 1 required
CreateRFQResponse
object
1 property 1 required
AcceptQuoteRequest
object
1 property 1 required
GetQuotesResponse
object
2 properties 1 required
CreateRFQRequest
object
9 properties 2 required
MveSelectedLeg
object
4 properties
UserFilter
string
Omit or leave empty to return all results. Use self to filter by the authenticated user.
Quote
object
28 properties 11 required

Specification

The full machine-readable OpenAPI contract behind this narrative.

Source

kalshi-communications-api-openapi.yml Raw ↑

Other APIs Kalshi publishes across the network.

Kalshi Trade API (Demo)
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Kalshi AsyncAPI Specification
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Kalshi Python Starter Kit
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Kalshi account API
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Kalshi api-keys API
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Kalshi events API
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Kalshi exchange API
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Kalshi fcm API
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Kalshi historical API
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Kalshi incentive-programs API
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Kalshi live-data API
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#Communications
← Back to K APIs
API Details
ID
kalshi:kalshi-communications-api
Base URL
https://api.elections.kalshi.com/trade-api/v2
Docs
https://docs.kalshi.com/api-reference
Provider
Kalshi
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