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Transaction Details API

The Transaction Details API lets partners submit comprehensive transaction data, including line-item tax breakdowns, to Reach.

Transaction Details API is one of 6 APIs that Reach publishes on the APIs.io network, described by a machine-readable OpenAPI specification.

This API exposes 2 JSON Schema definitions.

The published artifact set on APIs.io includes an OpenAPI specification and 2 JSON Schemas.

This API exposes 1 operation across 1 path, and defines 8 schemas. It is described by OpenAPI 3.2.0, at version 2.0.0.

Requests are made against 2 base URLs: https://api.withreach.com, https://api.sandbox.withreach.com.

1 operations 1 paths 8 schemas 1 POST

Metadata

The identity and technical contract details declared by the specification.

Specification
OpenAPI 3.2.0
API Version
2.0.0
Base URL
https://api.withreach.com
Authentication
HTTP Basic
Resource Areas
1

Authentication & Security 1

Transaction Details API declares 1 security scheme for authenticating requests. It accepts HTTP basic authentication (basicAuth). By default, every request must be authenticated.

  • basicAuth — HTTP Basic Auth credentials (username and password) issued by Reach during onboarding. Encode as Base64(username:password) in the Authorization header.

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.

Transaction Details 1

Pass tax details from a tax provider to Reach.

POST
/v2/transaction-details
Submit transaction details
submitTransactionDetails 1 param body → 202400401429

Schemas 8

The contract defines 8 schemas that model the data the API accepts and returns. The most detailed are TransactionDetailsModeA (13 properties), ItemTax (12 properties), LineItem (11 properties), TransactionDetailsModeB (10 properties). Each schema is shown below with its type and property counts.

Address
object
A postal address used for tax jurisdiction determination.
5 properties 3 required
LineItem
object
A single line item on the transaction.
11 properties 9 required
ErrorResponse
object
Returned for 400 Bad Request validation failures.
3 properties 2 required
TransactionDetailsModeB
object
Fulfillment partner or logistics providers pass tax details from their tax providers to Reach for reporting and compliance. The supplier's Reference ID is requ…
10 properties 7 required
AuthErrorResponse
object
Returned for 401 Unauthorized when Basic Auth credentials are missing or invalid, or the Reach-Merchant-Id header is missing or unrecognised.
2 properties 2 required
FieldError
object
Details of a single field-level validation failure.
3 properties 3 required
TransactionDetailsModeA
object
Suppliers or billing platforms provide tax details to Reach. Reach correlates this submission to the PSP webhook using PspTransactionId. Both PspTransactionId…
13 properties 9 required
ItemTax
object
A single tax charge at one jurisdiction level for a line item.
12 properties 10 required

Specification

The full machine-readable OpenAPI contract behind this narrative.

Source

withreach-transaction-details-api-openapi.yml Raw ↑

Other APIs Reach publishes across the network.

Reach GET API
Reach Order API
Reach POST API
Reach Quote API
Reach Session API
Where this information came from

This is an independent, third-party profile of Transaction Details 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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