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ParaSwap transactions API

Build parameters for a transaction

ParaSwap transactions API is one of 7 APIs that ParaSwap publishes on the APIs.io network, described by a machine-readable OpenAPI specification.

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

This API exposes 1 operation across 1 path, and defines 12 schemas. It is described by OpenAPI 3.0.3, at version 5.0.

Requests are made against a single base URL, https://apiv5.paraswap.io.

1 operations 1 paths 12 schemas 1 POST

Metadata

The identity and technical contract details declared by the specification.

Specification
OpenAPI 3.0.3
API Version
5.0
Base URL
https://api.paraswap.io
License
Resource Areas
1

Paths & Operations 1

Across 1 path, the API surfaces 1 operation — 1 POST. Each is listed below with its method, path, parameters, and response codes.

transactions 1

Build parameters for a transaction

POST
/transactions/{network}
Build Transaction to be sent to the blockchain.
buildTransaction 5 params body → 200400

Schemas 12

The contract defines 12 schemas that model the data the API accepts and returns. The most detailed are PriceRoute (22 properties), TransactionsRequestPayload (16 properties), TransactionsBuildResponse (7 properties), OptionalRate (5 properties). Each schema is shown below with its type and property counts.

TransactionsError
object
1 property 1 required
RouterParameters
array
Returned when /transactions is called with onlyParams=true
OptimalRoute
object
2 properties 2 required
Network
number
PriceRoute
object
Response body returned from /prices endpoint. Pass this object unmodified to /transactions.
22 properties 21 required
TransactionsBuildResponse
object
7 properties
OptimalSwap
object
5 properties 5 required
SwapSide
string
TokenDecimals
integer
OptimalSwapExchange
object
5 properties 4 required
OptionalRate
object
5 properties 3 required
TransactionsRequestPayload
object
16 properties 4 required

Specification

The full machine-readable OpenAPI contract behind this narrative.

Source

paraswap-transactions-api-openapi.yml Raw ↑

Other APIs ParaSwap publishes across the network.

ParaSwap Delta API
ParaSwap AugustusRFQ API
ParaSwap Tokens API
ParaSwap Subgraphs (GraphQL)
ParaSwap prices API
ParaSwap tokens API
Where this information came from

This is an independent, third-party profile of ParaSwap transactions API, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.

The Kin Score and Agent Readiness rating are independently calculated assessments of a company's public API artifacts, scored against a published rubric. They are not certifications, endorsements, security assessments, or audits.

Corrections, re-scores, and removal are free — no partnership or purchase required, and you do not need to justify the request. A removed company is recorded as unrated, never scored zero for having asked. Acknowledgement within one business day; removal within two.

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