Zelis

Zelis is a healthcare financial technology company that modernizes the business of healthcare by connecting payers, providers, and members through a connected platform for claims cost management, electronic payments, and member and provider communications. Its solutions span network analytics and optimization, claims pricing, editing and payment integrity, electronic provider payments (including the ZAPP platform), member engagement, price transparency and Transparency in Coverage compliance, and provider directory data. Zelis exposes these capabilities to partners through a public developer portal and API marketplace, where integrators can register for OAuth2 client-credential access to a catalog of claims, ID card, provider directory, enrollment, payments, and member-engagement communication APIs. The company serves 725+ payers and processes payments to hundreds of thousands of healthcare providers.

Zelis publishes 1 API on the APIs.io network. Tagged areas include Company, Healthcare, Healthcare Payments, Claims, and Payments.

Zelis’ developer surface includes documentation, API reference, getting-started guide, signup flow, pricing, support, engineering blog, and 9 more developer resources.

32.5/100 thin ▬ flat Agent 10/100 human only Full breakdown ↓
scored 2026-07-27 · rubric v0.5
AccessSelf serve
1 APIs
CompanyHealthcareHealthcare PaymentsClaimsPaymentsPrice TransparencyProvider DirectoryMember EngagementInsuranceFinTech

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5
Composite quality — 32.5/100 · thin
Contract Quality 0.0 / 25
Developer Ergonomics 10.4 / 20
Commercial Clarity 8.9 / 20
Operational Transparency 0.0 / 13
Governance 0.0 / 12
Discoverability 9.3 / 10
Agent readiness — 10/100 · human only
Machine-Readable Contract 0 / 18
Agentic Access Contract 0 / 15
MCP Server 0 / 12
Machine-Readable Auth 10 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 0 / 7
Typed Event Surface 0 / 6
Agent Skills 0 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3
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APIs 1

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

Zelis API

Zelis' partner-facing API platform, published through the Zelis developer portal and API marketplace. The catalog spans claims document search and viewing, member ID card search...

Security Posture 2

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

Zelis Authentication

oauth2/apiKey · 2 schemes

SECURITY

Zelis Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Get Started 3

Portal, sign-up, and the first successful call

Documentation 2

Reference material describing how the API behaves

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

Design & Contract 2

Pagination, idempotency, versioning, errors, and events

Access & Security 2

Authentication, authorization, and security posture

Operate 1

Status, limits, changes, and where to get help

Commercial 3

Pricing, plans, and the legal terms of use

Company 2

The organization behind the API

Source (apis.yml)

apis.yml Raw ↑
aid: zelis
accessModel:
  pricing: unknown
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Self-serve signup
  confidence: medium
  source:
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/zelis.png
name: Zelis
description: Zelis is a healthcare financial technology company that modernizes the business of healthcare by connecting payers,
  providers, and members through a connected platform for claims cost management, electronic payments, and member and provider
  communications. Its solutions span network analytics and optimization, claims pricing, editing and payment integrity, electronic
  provider payments (including the ZAPP platform), member engagement, price transparency and Transparency in Coverage compliance,
  and provider directory data. Zelis exposes these capabilities to partners through a public developer portal and API marketplace,
  where integrators can register for OAuth2 client-credential access to a catalog of claims, ID card, provider directory,
  enrollment, payments, and member-engagement communication APIs. The company serves 725+ payers and processes payments to
  hundreds of thousands of healthcare providers.
url: https://raw.githubusercontent.com/api-evangelist/zelis/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- bain-capital-ventures
- norwest-venture-partners
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-21'
tags:
- Company
- Healthcare
- Healthcare Payments
- Claims
- Payments
- Price Transparency
- Provider Directory
- Member Engagement
- Insurance
- FinTech
apis:
- name: Zelis API
  description: Zelis' partner-facing API platform, published through the Zelis developer portal and API marketplace. The catalog
    spans claims document search and viewing, member ID card search and viewing, provider directory, enrollment communications,
    payments communications, and member activation/reward surfaces. Access is gated behind OAuth2 client-credential tokens
    plus an Azure API Management subscription key (Ocp-Apim-Subscription-Key).
  humanURL: https://developer.zelis.com/
  baseURL: https://api.zelis.com/
  tags:
  - Healthcare
  - Claims
  - Payments
  - Provider Directory
  properties:
  - type: Authentication
    url: authentication/zelis-authentication.yml
  - type: Conventions
    url: conventions/zelis-conventions.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://www.zelis.com/
- type: DeveloperPortal
  url: https://developer.zelis.com/
- type: Documentation
  url: https://developer.zelis.com/guides
- type: APIReference
  url: https://marketplace.zelis.com/api-catalog/
- type: GettingStarted
  url: https://developer.zelis.com/guides/getting-started-guests
- type: SignUp
  url: https://devportalsignup.zelis.com/
- type: Pricing
  url: https://marketplace.zelis.com/connect-with-zelis/
- type: Support
  url: https://developer.zelis.com/support
- type: Blog
  url: https://www.zelis.com/blog/
- type: PrivacyPolicy
  url: https://www.zelis.com/privacy-policy/
- type: TermsOfService
  url: https://www.zelis.com/terms-of-use/
- type: Authentication
  url: authentication/zelis-authentication.yml
- type: Conventions
  url: conventions/zelis-conventions.yml
- type: Conformance
  url: conformance/zelis-conformance.yml
- type: LLMsTxt
  url: llms/zelis-llms.txt
- type: DomainSecurity
  url: security/zelis-domain-security.yml
x-enrichment:
  date: '2026-07-21'
  status: enriched
  artifacts_added: 5
  pass: local-v1