Lawmatics Payment Transactions API
The Payment Transactions API from Lawmatics — 2 operation(s) for payment transactions.
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OpenAPI Specification
openapi: 3.2.0
info:
title: Lawmatics OAuth Payment Transactions API
version: 1.22.0
description: The official Lawmatics REST API for legal CRM, client intake and law firm automation.
contact:
name: Lawmatics API Support
email: api@lawmatics.com
url: https://docs.lawmatics.com/
termsOfService: https://www.lawmatics.com/terms-of-use
servers:
- url: https://api.lawmatics.com
description: Lawmatics production API
security:
- oauth2: []
- bearerAuth: []
tags:
- name: Payment Transactions
paths:
/v1/transactions/{transaction_id}:
get:
operationId: getTransaction
summary: Transaction
description: A specific Transaction in Lawmatics
tags:
- Payment Transactions
parameters:
- name: transaction_id
in: path
required: true
description: The transaction id
schema:
type: string
responses:
'200':
description: OK
content:
application/json:
schema:
type: object
examples:
getTransaction:
summary: GET Transaction
value:
data:
id: '1'
type: transaction
attributes:
account_type: Contact
bank_account_type: trust
status: processed
payment_method: venmo
transaction_type: credit
amount_cents: 12323
amount_currency: USD
account_id: 101
created_by_id: 5
firm_id: 2
external_id: null
invoice_id: null
prospect_id: 101
created_at: '2021-12-26T14:52:44.808-08:00'
updated_at: '2021-12-26T14:52:44.808-08:00'
note: Such a goo payment
relationships:
account:
data:
id: '101'
type: contact
prospect:
data:
id: '101'
type: prospect
invoice:
data: null
'401':
description: Unauthorized - missing or invalid OAuth 2.0 bearer token
'429':
description: Too Many Requests - the per-firm rate limit was exceeded; a Retry-After header is returned
headers:
Retry-After:
description: Seconds to wait before retrying
schema:
type: integer
/v1/transactions:
get:
operationId: getTransactions
summary: Transactions
description: A paginated list of all Transactions in Lawmatics
tags:
- Payment Transactions
parameters:
- name: fields
in: query
required: false
schema:
type: string
example: all
responses:
'200':
description: OK
content:
application/json:
schema:
type: object
examples:
getTransactions:
summary: GET Transactions
value:
data:
- id: '6'
type: transaction
attributes:
account_type: Contact
bank_account_type: trust
status: processed
payment_method: other
transaction_type: credit
amount_cents: 12300
amount_currency: USD
account_id: 3
created_by_id: 5
firm_id: 2
external_id: null
invoice_id: null
prospect_id: null
created_at: '2022-04-21T00:17:38.437-07:00'
updated_at: '2022-04-21T00:17:38.437-07:00'
note: asdasd
relationships:
account:
data:
id: '3'
type: contact
prospect:
data: null
invoice:
data: null
- id: '5'
type: transaction
attributes:
account_type: Contact
bank_account_type: trust
status: processed
payment_method: credit_card
transaction_type: credit
amount_cents: 1230
amount_currency: USD
account_id: 3
created_by_id: 5
firm_id: 2
external_id: null
invoice_id: null
prospect_id: 3
created_at: '2022-04-20T22:37:22.982-07:00'
updated_at: '2022-04-20T22:37:22.982-07:00'
note: asdasdas
relationships:
account:
data:
id: '3'
type: contact
prospect:
data:
id: '3'
type: prospect
invoice:
data: null
- id: '4'
type: transaction
attributes:
account_type: Contact
bank_account_type: trust
status: processed
payment_method: credit_card
transaction_type: credit
amount_cents: 1230
amount_currency: USD
account_id: 9
created_by_id: 5
firm_id: 2
external_id: null
invoice_id: null
prospect_id: null
created_at: '2022-04-20T16:47:22.562-07:00'
updated_at: '2022-04-20T16:47:22.562-07:00'
note: asdasdasd
relationships:
account:
data:
id: '9'
type: contact
prospect:
data: null
invoice:
data: null
- id: '3'
type: transaction
attributes:
account_type: Contact
bank_account_type: trust
status: processed
payment_method: credit_card
transaction_type: credit
amount_cents: 12300
amount_currency: USD
account_id: 3
created_by_id: 5
firm_id: 2
external_id: null
invoice_id: null
prospect_id: 3
created_at: '2022-04-20T16:47:07.893-07:00'
updated_at: '2022-04-20T16:47:07.893-07:00'
note: test
relationships:
account:
data:
id: '3'
type: contact
prospect:
data:
id: '3'
type: prospect
invoice:
data: null
- id: '2'
type: transaction
attributes:
account_type: Contact
bank_account_type: trust
status: processed
payment_method: credit_card
transaction_type: credit
amount_cents: 123123
amount_currency: USD
account_id: 101
created_by_id: 5
firm_id: 2
external_id: null
invoice_id: null
prospect_id: 101
created_at: '2022-01-10T20:05:03.839-08:00'
updated_at: '2022-01-10T20:05:03.839-08:00'
note: Tester
relationships:
account:
data:
id: '101'
type: contact
prospect:
data:
id: '101'
type: prospect
invoice:
data: null
- id: '1'
type: transaction
attributes:
account_type: Contact
bank_account_type: trust
status: processed
payment_method: venmo
transaction_type: credit
amount_cents: 12323
amount_currency: USD
account_id: 101
created_by_id: 5
firm_id: 2
external_id: null
invoice_id: null
prospect_id: 101
created_at: '2021-12-26T14:52:44.808-08:00'
updated_at: '2021-12-26T14:52:44.808-08:00'
note: Such a goo payment
relationships:
account:
data:
id: '101'
type: contact
prospect:
data:
id: '101'
type: prospect
invoice:
data: null
meta:
total_pages: 1
limit_per_page: 25
total_entries: 6
links:
self: /v1/transactions?page=1
'401':
description: Unauthorized - missing or invalid OAuth 2.0 bearer token
'429':
description: Too Many Requests - the per-firm rate limit was exceeded; a Retry-After header is returned
headers:
Retry-After:
description: Seconds to wait before retrying
schema:
type: integer
post:
operationId: createTransaction
summary: Create Transaction
description: 'Create a new Transaction
Optional Fields: invoice_number, invoice_id, note
invoice_number or invoice_id: only one should be specified
transactable: Prospect, Contact, Company with which to associate the transaction
transaction_type: debit or credit
bank_account_type: operating or trust
payment_method: credit_card, check, cash, paypal, venmo, trust_payment, debit_card, ach, or other'
tags:
- Payment Transactions
parameters:
- name: fields
in: query
required: false
schema:
type: string
example: all
responses:
'200':
description: OK
content:
application/json:
schema:
type: object
examples:
postCreateRefundTransaction:
summary: POST Create Refund Transaction
value:
data:
id: '38'
type: transaction
attributes:
account_type: Contact
bank_account_type: operating
payment_method: invoice_refund
transaction_type: debit
amount_cents: 5000
amount_currency: USD
account_id: 112
external_id: null
created_at: '2022-12-27T13:15:25.890-08:00'
updated_at: '2022-12-27T13:15:25.890-08:00'
note: ''
relationships:
created_by:
data:
id: '5'
type: user
account:
data:
id: '112'
type: contact
prospect:
data:
id: '113'
type: prospect
invoice:
data:
id: '1'
type: invoice
trust_fund_request:
data: null
refunded_transaction:
data:
id: '30'
type: transaction
postCreateTransaction:
summary: POST Create Transaction
value:
data:
id: '36'
type: transaction
attributes:
account_type: Contact
bank_account_type: operating
payment_method: credit_card
transaction_type: credit
amount_cents: 5000
amount_currency: USD
account_id: 112
external_id: null
created_at: '2022-12-27T13:09:52.790-08:00'
updated_at: '2022-12-27T13:09:52.790-08:00'
note: ''
relationships:
created_by:
data:
id: '5'
type: user
account:
data:
id: '112'
type: contact
prospect:
data:
id: '113'
type: prospect
invoice:
data:
id: '1'
type: invoice
trust_fund_request:
data: null
'401':
description: Unauthorized - missing or invalid OAuth 2.0 bearer token
'429':
description: Too Many Requests - the per-firm rate limit was exceeded; a Retry-After header is returned
headers:
Retry-After:
description: Seconds to wait before retrying
schema:
type: integer
components:
securitySchemes:
oauth2:
type: oauth2
description: OAuth 2.0 authorization code grant. Register a developer app at https://app.lawmatics.com/settings/developers (developer settings must be enabled by Lawmatics support). Access tokens are non-expiring; no refresh tokens are issued and scopes are not supported.
flows:
authorizationCode:
authorizationUrl: https://app.lawmatics.com/oauth/authorize
tokenUrl: https://api.lawmatics.com/oauth/token
scopes: {}
bearerAuth:
type: http
scheme: bearer
description: 'The OAuth 2.0 access token is sent as `Authorization: Bearer <access_token>`.'
externalDocs:
description: Official Lawmatics RESTful API documentation (Postman)
url: https://docs.lawmatics.com/
x-provenance:
generated: '2026-08-13'
method: derived
publisher: API Evangelist
source: https://docs.lawmatics.com/api/collections/26379991/2sA3JM7gbw?segregateAuth=true&versionTag=latest
source_type: Postman collection published by Lawmatics as its official API documentation
source_file: postman/lawmatics-oauth-api.postman_collection.json
note: 'NOT published by Lawmatics. Lawmatics publishes no OpenAPI. Every path, method, parameter, request example and response example in this document was converted mechanically from the provider-published Postman collection "Lawmatics OAuth API v1.22.0"; nothing was invented. Schemas are typed as generic objects because the collection carries examples, not JSON Schema. The server URL is the base documented in the collection Param Guide (https://api.lawmatics.com), not the collection''s disabled {{host}} placeholder. The 401 and 429 responses added to every authenticated operation are the provider-documented, globally applicable responses: the collection''s auth guide states a per-firm rate limit applies to all endpoints and returns 429 with a Retry-After header, and https://api.lawmatics.com/v1/contacts was observed returning 401 unauthenticated on 2026-08-13.'