Paymentsense website screenshot

Paymentsense

Paymentsense is a United Kingdom payment processing company that provides card payment acceptance to small and medium-sized businesses through card machines (PDQ terminals), online payment gateways, and EPOS integrations. Now part of Dojo, its developer-facing surface centers on the Connect platform, a cloud-hosted integration layer that gives each merchant an isolated host so point-of-sale and hospitality software can drive card terminals without touching card data. Paymentsense publishes a genuine public developer portal at docs.connect.paymentsense.cloud with interactive Swagger reference docs and downloadable OpenAPI/Swagger specifications for the Connect REST API (Pay-At-Counter and Pay-At-Table terminal integration, versions v0/v1/v2) and the Connect-E REST API for online/e-commerce card payments, plus a documented WebSockets interface. Authentication is HTTP Basic using a per-merchant API key supplied by Paymentsense. A separate merchant/software-house management portal at developers.paymentsense.com sits behind Google sign-in.

Paymentsense publishes 2 APIs on the APIs.io network: Connect REST API and Connect-E REST API. Tagged areas include Payments, United Kingdom, Payment Gateway, Payment Processing, and Card Payments.

The Paymentsense catalog on APIs.io includes 1 event-driven AsyncAPI specification.

Paymentsense’s developer surface includes authentication, sandbox, changelog, documentation, API reference, getting-started guide, pricing, and 24 more developer resources.

🌐 Visit website 📡 Source on GitHub
52.5/100 developing ▬ flat Agent 44/100 agent ready Full breakdown ↓
scored 2026-08-17 · rubric v0.11.0
3 APIs 1 MCP Servers
PaymentsUnited KingdomPayment GatewayPayment ProcessingCard PaymentsAcquiringPoint of SaleIn-Person Payments

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-08-17 · rubric v0.11.0
Composite quality — 52.5/100 · developing
Contract Quality 12.8 / 21
Developer Ergonomics 10.6 / 17
Commercial Clarity 8.9 / 17
Operational Transparency 4.1 / 11
Governance 2.1 / 10
Discoverability 6.9 / 9
Regulatory Posture 7.0 / 15
Agent readiness — 44/100 · agent ready
Machine-Readable Contract 18 / 18
Agentic Access Contract 10 / 10
MCP Server 12 / 12
Machine-Readable Auth 10 / 10
Idempotency 0 / 9
Stable Error Semantics 8 / 8
Request/Response Examples 7 / 7
Rate-Limit Signaling 0 / 7
Typed Event Surface 6 / 6
Agent Skills 5 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3
A2A Agent Card 0 / 8
Dry-Run / Simulate Mode 0 / 4
Regulatory Posture applies to this provider. Its tags matched the Payments regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.
The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/paymentsense: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 3

Individual APIs this provider publishes, each with its own machine-readable definition.

Paymentsense Connect REST API

Cloud REST API for driving Paymentsense card terminals from EPOS software. Covers Pay-At-Counter (/pac) transactions and reports and Pay-At-Table (/pat) hospitality flows agains...

Paymentsense Connect-E REST API

OpenAPI 3.0 REST API for online / e-commerce card payments. Issues access-tokens, processes and resumes payments, runs cross-reference (repeat) payments, and lists supported pay...

Paymentsense Connect WebSockets API

Documented WebSockets interface for the Connect platform, offering an event-driven alternative to the REST API for terminal integration. No downloadable OpenAPI/AsyncAPI specifi...

Open Collections 4

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

Connect-E Development Environment

OPEN COLLECTION

Connect REST API

OPEN COLLECTION

Connect REST API

OPEN COLLECTION

Connect REST API

OPEN COLLECTION

Arazzo Workflows 1

Multi-step API workflows described with the Arazzo specification.

Paymentsense Pay-At-Counter — take a card payment

List a terminal, start a card transaction on it, and poll to the outcome.

ARAZZO

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

paymentsense-mcp.yml

MCP SERVER

Event Specifications 1

AsyncAPI definitions for this provider's event-driven and streaming APIs.

Paymentsense Connect Events

ASYNCAPI

Security Posture 2

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Paymentsense Authentication

apiKey/http · 3 schemes

SECURITY

Paymentsense Domain Security

TLSv1.3 · DMARC

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Paymentsense Agentic Access

50 operations · 28 acting · 1 human-in-the-loop

50 operations · 28 acting

AGENTIC

Resources

Get Started 4

Portal, sign-up, and the first successful call

Sandbox
Sandbox
 Login
Login
 DeveloperPortal
DeveloperPortal
 GettingStarted
GettingStarted

Documentation 2

Reference material describing how the API behaves

Documentation
Documentation
 APIReference
APIReference

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess
AgenticAccess
 MCPServer
MCPServer
 LLMsTxt
LLMsTxt
 AgentSkill
AgentSkill

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Conventions
Conventions
 ErrorCatalog
ErrorCatalog
 DataModel
DataModel
 Conformance
Conformance
 Lifecycle
Lifecycle

Build 3

SDKs, sample code, and the tooling you integrate with

Packages
Packages
 ToolCrosswalk
ToolCrosswalk
 GitHubOrganization
GitHubOrganization

Access & Security 3

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity
 Authentication
Authentication
 Compliance
Compliance

Operate 4

Status, limits, changes, and where to get help

StatusPage
StatusPage
 ChangeLog
ChangeLog
 ChangeLog
ChangeLog
 HelpCenter
HelpCenter

Commercial 3

Pricing, plans, and the legal terms of use

Pricing
Pricing
 TermsOfService
TermsOfService
 PrivacyPolicy
PrivacyPolicy

Company 3

The organization behind the API

Website
Website
 Blog
Blog
 LinkedIn
LinkedIn

Source (apis.yml)

apis.yml Raw ↑ 
aid: paymentsense
url: https://raw.githubusercontent.com/api-evangelist/paymentsense/refs/heads/main/apis.yml
name: Paymentsense
kind: company
description: Paymentsense is a United Kingdom payment processing company that provides card payment acceptance to small and
  medium-sized businesses through card machines (PDQ terminals), online payment gateways, and EPOS integrations. Now part
  of Dojo, its developer-facing surface centers on the Connect platform, a cloud-hosted integration layer that gives each
  merchant an isolated host so point-of-sale and hospitality software can drive card terminals without touching card data.
  Paymentsense publishes a genuine public developer portal at docs.connect.paymentsense.cloud with interactive Swagger reference
  docs and downloadable OpenAPI/Swagger specifications for the Connect REST API (Pay-At-Counter and Pay-At-Table terminal
  integration, versions v0/v1/v2) and the Connect-E REST API for online/e-commerce card payments, plus a documented WebSockets
  interface. Authentication is HTTP Basic using a per-merchant API key supplied by Paymentsense. A separate merchant/software-house
  management portal at developers.paymentsense.com sits behind Google sign-in.
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
tags:
- Payments
- United Kingdom
- Payment Gateway
- Payment Processing
- Card Payments
- Acquiring
- Point of Sale
- In-Person Payments
created: '2026-07-24'
modified: '2026-07-24'
specificationVersion: '0.19'
apis:
- aid: paymentsense:connect-rest-api
  name: Paymentsense Connect REST API
  description: Cloud REST API for driving Paymentsense card terminals from EPOS software. Covers Pay-At-Counter (/pac) transactions
    and reports and Pay-At-Table (/pat) hospitality flows against a per-merchant Connect host. Published in versions v0 (Swagger
    2.0, 3.0-beta), v1 (Swagger 2.0, 3.1) and v2 (OpenAPI 3.0, 3.2, current). Authenticates with HTTP Basic using the merchant
    API key as the password.
  humanURL: https://docs.connect.paymentsense.cloud/rest/api
  baseURL: https://your-host-here.connect.paymentsense.cloud
  tags:
  - Payments
  - Point of Sale
  - Card Payments
  - Pay At Table
  properties:
  - type: Documentation
    url: https://docs.connect.paymentsense.cloud/rest/getting-started
  - type: APIReference
    url: https://docs.connect.paymentsense.cloud/rest/api
  - type: OpenAPI
    url: openapi/paymentsense-connect-v2.json
  - type: OpenAPI
    url: openapi/paymentsense-connect-v1.json
  - type: OpenAPI
    url: openapi/paymentsense-connect-v0.json
  - type: Overlay
    url: overlays/paymentsense-connect-v2-overlay.yaml
  - type: Overlay
    url: overlays/paymentsense-connect-v1-overlay.yaml
  - type: Overlay
    url: overlays/paymentsense-connect-v0-overlay.yaml
  - type: Arazzo
    name: Pay-At-Counter — take a card payment
    url: arazzo/paymentsense-pac-take-payment.yml
- aid: paymentsense:connect-e-rest-api
  name: Paymentsense Connect-E REST API
  description: OpenAPI 3.0 REST API for online / e-commerce card payments. Issues access-tokens, processes and resumes payments,
    runs cross-reference (repeat) payments, and lists supported payment methods against the Connect-E host (e.<host>.connect.paymentsense.cloud).
  humanURL: https://docs.connect.paymentsense.cloud/ConnectE/RestApi
  baseURL: https://e.test.connect.paymentsense.cloud
  tags:
  - Payments
  - Online Payments
  - Card Payments
  - E-Commerce
  properties:
  - type: Documentation
    url: https://docs.connect.paymentsense.cloud/ConnectE/RestApi
  - type: APIReference
    url: https://docs.connect.paymentsense.cloud/ConnectE/RestApi
  - type: OpenAPI
    url: openapi/paymentsense-connect-e-v0.json
  - type: Overlay
    url: overlays/paymentsense-connect-e-v0-overlay.yaml
  - type: Components
    url: components/paymentsense-components.yml
- aid: paymentsense:connect-websockets-api
  name: Paymentsense Connect WebSockets API
  description: Documented WebSockets interface for the Connect platform, offering an event-driven alternative to the REST
    API for terminal integration. No downloadable OpenAPI/AsyncAPI specification is published; only reference documentation
    is available.
  humanURL: https://docs.connect.paymentsense.cloud/websockets/api
  baseURL: https://your-host-here.connect.paymentsense.cloud
  tags:
  - Payments
  - WebSockets
  - Point of Sale
  properties:
  - type: Documentation
    url: https://docs.connect.paymentsense.cloud/websockets/getting-started
  - type: APIReference
    url: https://docs.connect.paymentsense.cloud/websockets/api
  - type: Webhooks
    url: asyncapi/paymentsense-connect-events.yml
common:
- type: DomainSecurity
  url: security/paymentsense-domain-security.yml
- type: AgenticAccess
  url: agentic-access/paymentsense-agentic-access.yml
- type: Authentication
  url: authentication/paymentsense-authentication.yml
- type: Packages
  url: packages/paymentsense-packages.yml
- type: MCPServer
  url: mcp/paymentsense-mcp.yml
- type: ToolCrosswalk
  url: mcp/paymentsense-tool-crosswalk.yml
- type: LLMsTxt
  url: llms/paymentsense-llms.txt
- type: Conventions
  url: conventions/paymentsense-conventions.yml
- type: ErrorCatalog
  url: errors/paymentsense-problem-types.yml
- type: DataModel
  url: data-model/paymentsense-data-model.yml
- type: Conformance
  url: conformance/paymentsense-conformance.yml
- type: Compliance
  url: https://dojo.tech/articles/what-is-pci-compliance/
- type: Sandbox
  url: sandbox/paymentsense-sandbox.yml
- type: Lifecycle
  url: lifecycle/paymentsense-lifecycle.yml
- type: StatusPage
  url: https://status.paymentsense.com/
- type: ChangeLog
  url: changelog/paymentsense-changelog.yml
- type: ChangeLog
  url: https://docs.connect.paymentsense.cloud/rest/changelog
- type: AgentSkill
  url: skills/_index.yml
- type: Login
  url: https://developers.paymentsense.com
- type: Website
  url: https://www.paymentsense.com/uk/
- type: DeveloperPortal
  url: https://docs.connect.paymentsense.cloud/
- type: Documentation
  url: https://docs.connect.paymentsense.cloud/
- type: APIReference
  url: https://docs.connect.paymentsense.cloud/rest/api
- type: GettingStarted
  url: https://docs.connect.paymentsense.cloud/rest/getting-started
- type: GitHubOrganization
  url: https://github.com/Paymentsense-DevSupport
- type: Pricing
  url: https://www.paymentsense.com/uk/pricing/
- type: Blog
  url: https://www.paymentsense.com/uk/blog/
- type: HelpCenter
  url: https://support.paymentsense.com/hc/en-us
- type: TermsOfService
  url: https://www.paymentsense.com/uk/legal/terms/
- type: PrivacyPolicy
  url: https://www.paymentsense.com/uk/legal/privacy/
- type: LinkedIn
  url: https://www.linkedin.com/company/paymentsense/
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com