Version: 1.0.0

• OpenAPI Spec

OTC API

OTC (Over-The-Counter) trading API for large block trades with guaranteed pricing.

Base URL: https://api.btse.com Testnet: https://testapi.btse.io

OTC Trading Flow

1. Get Markets — check available assets and size limits
2. Request Quote — get a price quote (valid for ~6 seconds)
3. Accept Quote — execute the quote before it expires

Tip: Quotes can be partially accepted by sending baseSize or quoteSize in the accept request.

Authentication

Most OTC endpoints require Trading permission. See the Authentication Guide.

Rate Limit

50 requests per 2 seconds based on your IP.

Authentication

API Key: api

API key

Security Scheme Type:	apiKey
Header parameter name:	request-api

API Key: nonce

Current timestamp in milliseconds

Security Scheme Type:	apiKey
Header parameter name:	request-nonce

API Key: sign

HMAC-SHA384 signature: HMAC-SHA384(secret, path + nonce + body)

Security Scheme Type:	apiKey
Header parameter name:	request-sign

Contact

Support:

URL: https://support.btse.com