Kard

Kard is an independent commerce media network and card-linked-offers (CLO) rewards platform. Its Rewards API lets fintechs, banks, and card issuers enroll cardholders, submit transactions for closed-loop offer matching, surface personalized offers and redemption locations, run attributions and placements, and receive earned-reward webhook notifications — powering embedded loyalty and cashback programs without building the matching infrastructure. Marketers use the same network to reach 47M+ cardholders with performance-based, transaction-driven offers.

Kard publishes 1 API on the APIs.io network: Rewards API. Tagged areas include Company, Rewards, Card-Linked Offers, Loyalty, and Fintech.

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

Kard’s developer surface includes documentation, API reference, getting-started guide, quickstart, authentication, engineering blog, support, and 27 more developer resources.

🌐 Visit website 📡 Source on GitHub
45.8/100 developing Agent 78/100 agent native Full breakdown ↓
scored 2026-07-20 · rubric v0.4
1 APIs 1 MCP Servers 0 Features
CompanyRewardsCard-Linked OffersLoyaltyFintechCommerce MediaAdvertisingTransactionsCashbackWebhooks

API Rating

API Evangelist API Evangelist Rating How this is scored →
scored 2026-07-20 · rubric v0.4
Composite quality — 45.8/100 · developing
Contract Quality 10.0 / 25
Developer Ergonomics 15.7 / 20
Commercial Clarity 4.7 / 20
Operational Transparency 6.2 / 13
Governance 0.0 / 12
Discoverability 9.3 / 10
Agent readiness — 78/100 · agent native
Machine-Readable Contract 18 / 18
Agentic Access Contract 15 / 15
MCP Server 12 / 12
Machine-Readable Auth 10 / 10
Idempotency 0 / 9
Stable Error Semantics 8 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 0 / 7
Typed Event Surface 6 / 6
Agent Skills 5 / 5
Well-Known Catalog 4 / 4
Consent & Bot Identity 3 / 3
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/kard: 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

Kard Rewards API

Kard Rewards API (version 2024-10-01) — enroll users, submit transactions for CLO matching, fetch offers/locations, manage attributions, placements, content strategies, and earn...

MCP Servers

kard-mcp.yml

MCP SERVER

Event Specifications

Kard Notifications Webhooks

ASYNCAPI

Resources

Get Started 4

Portal, sign-up, and the first successful call

DeveloperPortal
DeveloperPortal
 GettingStarted
GettingStarted
 Quickstart
Quickstart
 SignUp
SignUp

Documentation 2

Reference material describing how the API behaves

Documentation
Documentation
 APIReference
APIReference

Agent Surfaces 5

MCP servers, agent skills, and machine-readable catalogs

MCPServer
MCPServer
 LLMsTxt
LLMsTxt
 AgentSkill
AgentSkill
 WellKnown
WellKnown
 AgenticAccess
AgenticAccess

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Components
Components
 Webhooks
Webhooks
 ErrorCatalog
ErrorCatalog
 Conventions
Conventions
 Conformance
Conformance
 Lifecycle
Lifecycle

Build 4

SDKs, sample code, and the tooling you integrate with

SDKs
SDKs
 Packages
Packages
 Postman
Postman
 GitHubOrganization
GitHubOrganization

Access & Security 6

Authentication, authorization, and security posture

Authentication
Authentication
 OAuthScopes
OAuthScopes
 SecurityTxt
SecurityTxt
 DomainSecurity
DomainSecurity
 VulnerabilityDisclosure
VulnerabilityDisclosure
 Security
Security

Operate 3

Status, limits, changes, and where to get help

StatusPage
StatusPage
 Deprecation
Deprecation
 Support
Support

Commercial 1

Pricing, plans, and the legal terms of use

PrivacyPolicy
PrivacyPolicy

Company 2

The organization behind the API

Website
Website
 Blog
Blog

Other 1

Properties that don't map to a standard resource type

APICatalog
APICatalog

Source (apis.yml)

apis.yml Raw ↑ 
aid: kard
name: Kard
description: Kard is an independent commerce media network and card-linked-offers (CLO) rewards platform. Its Rewards API
  lets fintechs, banks, and card issuers enroll cardholders, submit transactions for closed-loop offer matching, surface personalized
  offers and redemption locations, run attributions and placements, and receive earned-reward webhook notifications — powering
  embedded loyalty and cashback programs without building the matching infrastructure. Marketers use the same network to reach
  47M+ cardholders with performance-based, transaction-driven offers.
image: https://cdn.prod.website-files.com/6501e86bc5fd522771731f1e/6900e3183a88a4d43e5f8952_Preview-image.png
url: https://raw.githubusercontent.com/api-evangelist/kard/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- techstars
x-tier: enriched
x-tier-reason: real-openapi-and-artifacts
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-19'
tags:
- Company
- Rewards
- Card-Linked Offers
- Loyalty
- Fintech
- Commerce Media
- Advertising
- Transactions
- Cashback
- Webhooks
apis:
- name: Kard Rewards API
  description: Kard Rewards API (version 2024-10-01) — enroll users, submit transactions for CLO matching, fetch offers/locations,
    manage attributions, placements, content strategies, and earned-reward webhook subscriptions.
  humanURL: https://docs.getkard.com/home
  baseURL: https://rewards-api.getkard.com
  properties:
  - type: OpenAPI
    url: openapi/kard-api-reference-openapi.yaml
  - type: OpenAPI
    url: openapi/kard-legacy-openapi.yaml
  - type: Overlay
    url: overlays/kard-api-reference-overlay.yaml
  - type: Overlay
    url: overlays/kard-legacy-overlay.yaml
  - type: Authentication
    url: authentication/kard-authentication.yml
  - type: OAuthScopes
    url: scopes/kard-scopes.yml
  - type: ErrorCatalog
    url: errors/kard-problem-types.yml
  - type: Conventions
    url: conventions/kard-conventions.yml
  - type: DataModel
    url: data-model/kard-data-model.yml
  - type: Conformance
    url: conformance/kard-conformance.yml
  - type: AsyncAPI
    url: asyncapi/kard-notifications-webhooks.yml
  - type: Webhooks
    url: asyncapi/kard-notifications-webhooks.yml
  - type: AgenticAccess
    url: agentic-access/kard-agentic-access.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://getkard.com/
- type: DeveloperPortal
  url: https://docs.getkard.com/home
- type: Documentation
  url: https://docs.getkard.com/home
- type: APIReference
  url: https://docs.getkard.com/api/transactions/create
- type: GettingStarted
  url: https://docs.getkard.com/api/integration-guides/getting-started
- type: Quickstart
  url: https://www.getkard.com/docs/quickstart
- type: Authentication
  url: authentication/kard-authentication.yml
- type: OAuthScopes
  url: scopes/kard-scopes.yml
- type: SDKs
  url: packages/kard-packages.yml
- type: Packages
  url: packages/kard-packages.yml
- type: MCPServer
  url: mcp/kard-mcp.yml
- type: LLMsTxt
  url: llms/kard-llms.txt
- type: AgentSkill
  url: skills/_index.yml
- type: WellKnown
  url: well-known/kard-well-known.yml
- type: APICatalog
  url: well-known/kard-api-catalog.json
- type: SecurityTxt
  url: well-known/kard-security.txt
- type: Components
  url: components/kard-components.yml
- type: Webhooks
  url: asyncapi/kard-notifications-webhooks.yml
- type: ErrorCatalog
  url: errors/kard-problem-types.yml
- type: Conventions
  url: conventions/kard-conventions.yml
- type: Conformance
  url: conformance/kard-conformance.yml
- type: Lifecycle
  url: lifecycle/kard-lifecycle.yml
- type: StatusPage
  url: https://status.getkard.com/
- type: Deprecation
  url: lifecycle/kard-lifecycle.yml
- type: DomainSecurity
  url: security/kard-domain-security.yml
- type: VulnerabilityDisclosure
  url: security/kard-vulnerability-disclosure.yml
- type: Security
  url: https://getkard.com/security
- type: AgenticAccess
  url: agentic-access/kard-agentic-access.yml
- type: Postman
  url: https://github.com/kard-financial/kard-postman
- type: GitHubOrganization
  url: https://github.com/kard-financial
- type: Blog
  url: https://www.getkard.com/blog
- type: Support
  url: https://www.getkard.com/contact
- type: SignUp
  url: https://www.getkard.com/demo
- type: PrivacyPolicy
  url: https://www.getkard.com/privacy-policy
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence