Overview - Credit runs on Sprinter

The Liquidity API exposes Sprinter Intent Liquidity that can be accessed through one of the supported intent protocols such as Across or LiFi Intents. The API allows you to discover where liquidity is available, get a quote for a borrow, and obtain the signing authorization needed to execute the transaction — all scoped to a chosen intent protocol.

These are zero-collateral loans — solvers borrow without locking upfront capital. Repayment is secured by the intent protocol’s escrow and settlement flow.

Base URL

https://api.sprinter.tech

Authentication

All Liquidity API requests must be authenticated with an API key, passed in the X-Auth-Token header:

curl --request GET \
  --url 'https://api.sprinter.tech/liquidity/chain/eip155:8453/tokens' \
  --header 'X-Auth-Token: YOUR_API_KEY'

Request Liquidity API credentials by contacting [email protected].

OpenAPI Specification

The full machine-readable API spec is available for AI agents, code generators, and API clients:

Resource	URL
OpenAPI Spec (JSON)	api.sprinter.tech/swagger/doc.json
Swagger UI	api.sprinter.tech/swagger/index.html

Point your AI agent or code generator at the OpenAPI spec to auto-generate a client in any language.

How it works

A typical cross-chain borrow follows this lifecycle:

Discover — check the tokens and liquidity available for a route (tokens, pools, fees).
Quote — request a borrow quote for the source chain, protocol, and type to get cost, fees, and a quote id.
Authorize — post the quote to get the signing authorization for the liquidity transaction.
Execute — submit the authorized transaction on-chain.

Endpoints

Info

Endpoint	Description
`GET /liquidity/chain/{chainId}/tokens`	Supported tokens for a chain
`GET /liquidity/pools/{poolType}`	Available liquidity for a pool type on a chain
`GET /liquidity/protocol/{protocol}/events`	Stream available-liquidity updates via SSE
`GET /liquidity/protocol/{protocol}/fees`	Fees and limits for a protocol route
`GET /protocol/{protocol}/solver`	Solver address for a protocol
`GET /health`	Service health check

Actions

Endpoint	Description
`GET /liquidity/v2/chain/{srcChain}/protocol/{protocol}/type/{type}/quote`	Borrow quote for a liquidity transaction
`POST /liquidity/v2/chain/{dstChain}/protocol/{protocol}/signature`	Signing authorization for a liquidity transaction

​Base URL

​Authentication

​OpenAPI Specification

​How it works

​Endpoints

​Info

​Actions

Base URL

Authentication

OpenAPI Specification

How it works

Endpoints

Info

Actions