Waystar is a healthcare payments and revenue cycle management (RCM) software company that operates a national clearinghouse connecting providers to payers. Its cloud platform spans financial clearance (eligibility, prior authorization, patient estimation), claim management, payment and remittance management, and denial prevention and recovery. Waystar exposes integration through REST APIs, web services, HL7, sFTP/batch, RPA, and X12 EDI transactions (270/271 eligibility, 276/277 claim status, 837 claims, 835 remittance/ERA, 278 authorization). API access is delivered through a partner/developer program at developer.waystar.com; the portal renders its full documentation navigation to anyone but serves a login form in place of every document body, and sandbox accounts are provisioned by email rather than self-service. Waystar publishes no OpenAPI, no llms.txt, no MCP server, no agent card and no client SDK in any package registry. Authentication is six hand-rolled schemes rather than one - HMAC-SHA1 body signatures on the classic Developer Suite, HMAC-SHA256 Authorization headers on Patient Estimation, credentials in the POST body on the eligibility gateway, HTTP Basic, WS-Security UsernameToken inside CAQH CORE SOAP envelopes, and X.509 client certificates - with no OAuth 2.0 and no OpenID Connect anywhere. The API surface below is documented from Waystar's public product pages, its developer-portal structure and the underlying X12 standards rather than from a published machine-readable definition.
Waystar publishes 7 APIs on the APIs.io network. Tagged areas include Healthcare, Revenue Cycle Management, RCM, Clearinghouse, and Healthcare Payments.
Waystar’s developer surface includes documentation, API reference, getting-started guide, support, signup flow, engineering blog, authentication, and 24 more developer resources.
Regulatory Posture applies to this provider. Its tags matched the
Health 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.
Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for
this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero:
never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and
several others — scorable at all.
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/.
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Real-time and batch insurance eligibility and benefits verification, exchanging X12 270 inquiries and 271 responses to confirm coverage, plan details, copays, deductibles, and s...
Automates prior authorization and referral determination and status, modeled on the X12 278 health care services review request/response. Covers submitting authorization request...
Produces pre-service, good-faith patient cost estimates by combining eligibility/benefit data, contracted rates, and procedure codes to support price transparency and up-front p...
Submits, scrubs, edits, tracks, and manages professional, institutional, and dental claims through Waystar's clearinghouse, modeled on the X12 837P/837I/837D claim transaction s...
Queries and monitors claim status across payers, modeled on the X12 276 status inquiry and 277 status response - returning received, accepted, pending, denied, and paid states. ...
Retrieves electronic remittance advice (835/ERA), payments, and adjustments for automated payment posting and reconciliation, with raw X12 835 artifacts and parsed JSON. Modeled...
Identifies denied claims, exposes denial and remark codes and explanation-of-benefits detail, and supports appeal creation, packaging, and resubmission workflows. Modeled from W...
aid: waystar
url: https://raw.githubusercontent.com/api-evangelist/waystar/refs/heads/main/apis.yml
name: Waystar
kind: company
description: Waystar is a healthcare payments and revenue cycle management (RCM) software company that operates a national
clearinghouse connecting providers to payers. Its cloud platform spans financial clearance (eligibility, prior authorization,
patient estimation), claim management, payment and remittance management, and denial prevention and recovery. Waystar exposes
integration through REST APIs, web services, HL7, sFTP/batch, RPA, and X12 EDI transactions (270/271 eligibility, 276/277
claim status, 837 claims, 835 remittance/ERA, 278 authorization). API access is delivered through a partner/developer program
at developer.waystar.com; the portal renders its full documentation navigation to anyone but serves a login form in place
of every document body, and sandbox accounts are provisioned by email rather than self-service. Waystar publishes no OpenAPI,
no llms.txt, no MCP server, no agent card and no client SDK in any package registry. Authentication is six hand-rolled schemes
rather than one - HMAC-SHA1 body signatures on the classic Developer Suite, HMAC-SHA256 Authorization headers on Patient
Estimation, credentials in the POST body on the eligibility gateway, HTTP Basic, WS-Security UsernameToken inside CAQH CORE
SOAP envelopes, and X.509 client certificates - with no OAuth 2.0 and no OpenID Connect anywhere. The API surface below
is documented from Waystar's public product pages, its developer-portal structure and the underlying X12 standards rather
than from a published machine-readable definition.
deliveryModel:
model: saas
open_source: false
commercial: true
callable_host: false
label: Hosted service · you call their endpoint
confidence: medium
source:
- pricing
generated: '2026-08-28'
method: derived
accessModel:
pricing: unknown
onboarding: unknown
trial: false
try_now: false
public: false
label: Unknown
confidence: low
source:
- plans
generated: '2026-07-22'
method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/waystar.png
tags:
- Healthcare
- Revenue Cycle Management
- RCM
- Clearinghouse
- Healthcare Payments
- Medical Billing
- X12 EDI
- Eligibility
- Claims
- Remittance
created: '2026-07-04'
modified: '2026-08-15'
specificationVersion: '0.23'
x-base-url-provenance: 'The baseURL on each API entry is the documented Waystar API host for that product, read from the Waystar
developer portal and recorded in authentication/waystar-authentication.yml and conventions/waystar-conventions.yml. Several
sit on zirmed.com rather than waystar.com: ZirMed is Waystar''s own legacy brand - Waystar was formed from the 2017 Navicure/ZirMed
merger - and both zirmed.com and www.zirmed.com 301 to https://www.waystar.com/. Every host was verified on 2026-08-15 to
resolve inside Waystar''s contiguous 69.2.x.x netblock and to answer HTTP. api.waystar.com is deliberately NOT used as a
base: it answers every path with a 403 edge challenge and is not a documented API host. The Denial & Appeal Management API
carries no baseURL because Waystar documents no host for it - an honest gap rather than a guess.'
apis:
- aid: waystar:waystar-eligibility-verification-api
name: Waystar Eligibility Verification API
tags:
- Eligibility
- Benefits
- X12 270/271
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
humanURL: https://www.waystar.com/our-platform/financial-clearance/eligibility-verification/
baseURL: https://eligibilityapi.zirmed.com/1.0/
properties:
- url: https://developer.waystar.com/
type: Documentation
- url: authentication/waystar-authentication.yml
type: Authentication
- url: https://www.waystar.com/our-platform/financial-clearance/eligibility-verification/
type: SignUp
description: Real-time and batch insurance eligibility and benefits verification, exchanging X12 270 inquiries and 271 responses
to confirm coverage, plan details, copays, deductibles, and service-type benefits before a visit. Endpoints are modeled
from Waystar's Eligibility product and the 270/271 transaction set; concrete paths are provisioned through the partner
program.
- aid: waystar:waystar-prior-authorization-api
name: Waystar Authorization & Referral API
tags:
- Prior Authorization
- Referrals
- X12 278
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
humanURL: https://www.waystar.com/our-platform/financial-clearance/authorizations/
baseURL: https://priorauthorizationapi.waystar.com/1.0/
properties:
- url: https://developer.waystar.com/
type: Documentation
- url: https://www.waystar.com/our-platform/financial-clearance/authorization-referral-status/
type: Documentation
description: Automates prior authorization and referral determination and status, modeled on the X12 278 health care services
review request/response. Covers submitting authorization requests, checking auth/referral status, and returning determinations.
Waystar layers RPA and payer-portal automation on top of EDI where payers lack a transaction. Modeled from public product
docs.
- aid: waystar:waystar-patient-estimation-api
name: Waystar Patient Estimation API
tags:
- Patient Estimation
- Price Transparency
- Financial Clearance
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
humanURL: https://www.waystar.com/our-platform/financial-clearance/coverage-detection/
baseURL: https://estimationapi.zirmed.com/1.0/
properties:
- url: https://developer.waystar.com/
type: Documentation
description: Produces pre-service, good-faith patient cost estimates by combining eligibility/benefit data, contracted rates,
and procedure codes to support price transparency and up-front patient collections. Modeled from Waystar's financial clearance
product; not backed by a published OpenAPI definition.
- aid: waystar:waystar-claim-management-api
name: Waystar Claim Management API
tags:
- Claims
- Claim Submission
- X12 837
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
humanURL: https://www.waystar.com/our-platform/claim-management/claim-manager/
baseURL: https://claimsapi.zirmed.com/
properties:
- url: https://developer.waystar.com/
type: Documentation
- url: https://www.waystar.com/our-platform/claim-management/claim-manager/
type: Documentation
description: Submits, scrubs, edits, tracks, and manages professional, institutional, and dental claims through Waystar's
clearinghouse, modeled on the X12 837P/837I/837D claim transaction set. Includes claim creation, validation against payer
edits, submission, and lifecycle management. Endpoints are modeled from the Claim Manager product and 837 standard.
- aid: waystar:waystar-claim-status-api
name: Waystar Claim Status API
tags:
- Claim Status
- X12 276/277
- Tracking
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
humanURL: https://www.waystar.com/our-platform/claim-management/claim-monitoring/
baseURL: https://claimsapi.zirmed.com/
properties:
- url: https://developer.waystar.com/
type: Documentation
description: Queries and monitors claim status across payers, modeled on the X12 276 status inquiry and 277 status response
- returning received, accepted, pending, denied, and paid states. Supports both real-time inquiry and automated status
monitoring. Modeled from Waystar's claim monitoring product.
- aid: waystar:waystar-remittance-era-api
name: Waystar Remittance & ERA API
tags:
- Remittance
- ERA
- X12 835
- Payment Posting
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
humanURL: https://www.waystar.com/our-platform/payment-management/remit-manager/
baseURL: https://remitsapi.waystar.com/
properties:
- url: https://developer.waystar.com/
type: Documentation
description: Retrieves electronic remittance advice (835/ERA), payments, and adjustments for automated payment posting and
reconciliation, with raw X12 835 artifacts and parsed JSON. Modeled on the X12 835 transaction and Waystar's Remit Manager
product; concrete endpoints are partner-provisioned.
- aid: waystar:waystar-denial-management-api
name: Waystar Denial & Appeal Management API
tags:
- Denials
- Appeals
- Recovery
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
humanURL: https://www.waystar.com/our-platform/denial-prevention-recovery/denial-recovery/
properties:
- url: https://developer.waystar.com/
type: Documentation
description: Identifies denied claims, exposes denial and remark codes and explanation-of-benefits detail, and supports
appeal creation, packaging, and resubmission workflows. Modeled from Waystar's denial prevention and recovery product;
not backed by a published OpenAPI definition.
common:
- type: LinkedIn
url: https://www.linkedin.com/company/waystar
- type: Website
url: https://www.waystar.com/
- type: DeveloperPortal
url: https://developer.waystar.com/
- type: Documentation
url: https://developer.waystar.com/
- type: APIReference
url: https://developer.waystar.com/documents/
- type: GettingStarted
url: https://developer.waystar.com/documents/integration-basics/
- type: Support
url: https://www.waystar.com/support/
- type: GitHubOrganization
url: https://github.com/WaystarInc
- type: SignUp
url: https://www.waystar.com/clients-partners/
- type: Login
url: https://www.waystar.com/login/
- type: TermsOfService
url: https://www.waystar.com/terms/
- type: PrivacyPolicy
url: https://www.waystar.com/privacy-policy/
- type: Blog
url: https://www.waystar.com/blog/
- type: BlogRSS
url: https://www.waystar.com/feed/
- type: StatusPage
url: http://status.esolutionsinc.com/
- type: Security
url: https://www.waystar.com/responsible-disclosure/
- type: VulnerabilityDisclosure
url: security/waystar-vulnerability-disclosure.yml
- type: DomainSecurity
url: security/waystar-domain-security.yml
- type: Authentication
url: authentication/waystar-authentication.yml
- type: Conventions
url: conventions/waystar-conventions.yml
- type: Idempotency
url: conventions/waystar-conventions.yml
- type: ErrorCatalog
url: errors/waystar-problem-types.yml
- type: Lifecycle
url: lifecycle/waystar-lifecycle.yml
- type: Conformance
url: conformance/waystar-conformance.yml
- type: Sandbox
url: sandbox/waystar-sandbox.yml
- type: DataModel
url: data-model/waystar-data-model.yml
- type: Packages
url: packages/waystar-packages.yml
- type: LLMsTxt
url: llms/waystar-llms.txt
- type: Plans
url: plans/waystar-plans-pricing.yml
- type: RateLimits
url: rate-limits/waystar-rate-limits.yml
- type: FinOps
url: finops/waystar-finops.yml
maintainers:
- FN: Kin Lane
email: kin@apievangelist.com
x-enrichment:
date: '2026-08-15'
status: enriched
artifacts_added: 4
pass: local-v1
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