Comerica

Comerica Incorporated is a Texas-headquartered super-regional financial services holding company providing retail, small-business, commercial, and wealth-management banking across the United States, with market concentrations in Texas, California, Michigan, Arizona, and Florida. As of July 2026 Comerica publishes NO first-party developer API portal: developer.comerica.com, api.comerica.com, and related developer subdomains do not resolve, and directory trackers (Open Banking Tracker, API Tracker) list no documented API products, OpenAPI/Swagger specs, SDKs, or Postman collections. Consumer and small-business account data is reached indirectly through US open-finance aggregators (Plaid, MX, Finicity, Akoya) and through Financial Data Exchange (FDX) APIs — the CFPB-recognized standard-setting body for the Section 1033 Personal Financial Data Rights rule — rather than a Comerica-published endpoint. Commercial treasury, cash-positioning, ACH/wire initiation, and reporting are delivered through Comerica's Cash Management and Commercial Information Management platforms under direct customer contract (host-to-host files, portal, and BAI/ISO 20022 feeds), not a public REST API. Note: Fifth Third Bancorp completed its all-stock acquisition of Comerica in February 2026, so Comerica's future digital and API surface is being integrated into Fifth Third's platform.

Comerica is profiled on the APIs.io network. Tagged areas include Banking, Commercial Banking, Financial-Services, Retail Banking, and Wealth Management.

Comerica’s developer surface includes engineering blog, support, and 20 more developer resources.

🌐 Visit website 📡 Source on GitHub

6.5/100 minimal ▬ flat Agent 0/100 human only saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

0 APIs

Banking Commercial Banking Financial-Services Retail Banking Wealth Management Treasury Management Open Banking Super-Regional Bank United States Fortune 1000

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 6.5/100 · minimal

Contract Quality 0.0 / 21

Developer Ergonomics 0.6 / 17

Access Clarity 1.8 / 17

Operational Transparency 0.6 / 11

Contract Governance 0.0 / 10

Discoverability 4.9 / 9

Regulatory Posture 1.9 / 15

Agent readiness — 0/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 0 / 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

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Regulatory Posture applies to this provider. Its tags matched the Banking & Open Finance 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/.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from github.com/api-evangelist/comerica: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Security Posture 1

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

Comerica Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Press 5

Recent news and press coverage referencing this provider.

Inaugural Comerica Bank Survey Finds Small Businesses ...

2026-05-25

Automation 101: Technology is Expanding Financial and ...

2026-05-25

Comerica Bank

2026-05-25

Making the Case for AI in Finance: Insights from Strategic ...

2026-05-25

Comerica says its AI bot performs work of six IT help desk ...

2026-05-25

Resources

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

Access & Security 2

Authentication, authorization, and security posture

Security

Security

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support

Support

Commercial 2

Pricing, plans, and the legal terms of use

PrivacyPolicy

PrivacyPolicy

TermsOfService

TermsOfService

Company 4

The organization behind the API

Website

Website

Blog

Blog

Investors

Investors

LinkedIn

Other 12

Properties that don't map to a standard resource type

Personal

SmallBusiness

Commercial

WealthManagement

CashManagement

CommercialInformationManagement

CommercialInformationManagement

OnlineBanking

FraudCenter

AggregatorPlaid

AggregatorAkoya

FDXStandard

Acquirer

Scroll for all 12

Source (apis.yml)

aid: comerica
url: ''
x-api-posture: no-product-api
x-api-posture-basis: observed https://raw.githubusercontent.com/api-evangelist/comerica/refs/heads/main/apis.yml
name: Comerica
tags:
- Banking
- Commercial Banking
- Financial-Services
- Retail Banking
- Wealth Management
- Treasury Management
- Open Banking
- Super-Regional Bank
- United States
- Fortune 1000
tags_raw:
- Banking
- Commercial Banking
- Financial Services
- Retail Banking
- Wealth Management
- Treasury Management
- Open Banking
- Super-Regional Bank
- United States
- Fortune 1000
type: Index
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: No public API — aggregator/FDX access only
  confidence: high
  source:
  - developer-portal-probe
  - openbankingtracker
  generated: '2026-07-23'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/comerica.png
access: 3rd-Party
kind: company
created: '2026-03-23'
modified: '2026-07-23'
position: Consuming
description: 'Comerica Incorporated is a Texas-headquartered super-regional financial services holding company providing retail,
  small-business, commercial, and wealth-management banking across the United States, with market concentrations in Texas,
  California, Michigan, Arizona, and Florida. As of July 2026 Comerica publishes NO first-party developer API portal: developer.comerica.com,
  api.comerica.com, and related developer subdomains do not resolve, and directory trackers (Open Banking Tracker, API Tracker)
  list no documented API products, OpenAPI/Swagger specs, SDKs, or Postman collections. Consumer and small-business account
  data is reached indirectly through US open-finance aggregators (Plaid, MX, Finicity, Akoya) and through Financial Data Exchange
  (FDX) APIs — the CFPB-recognized standard-setting body for the Section 1033 Personal Financial Data Rights rule — rather
  than a Comerica-published endpoint. Commercial treasury, cash-positioning, ACH/wire initiation, and reporting are delivered
  through Comerica''s Cash Management and Commercial Information Management platforms under direct customer contract (host-to-host
  files, portal, and BAI/ISO 20022 feeds), not a public REST API. Note: Fifth Third Bancorp completed its all-stock acquisition
  of Comerica in February 2026, so Comerica''s future digital and API surface is being integrated into Fifth Third''s platform.'
apis: []
common:
- type: Website
  url: https://www.comerica.com
- type: Personal
  url: https://www.comerica.com/personal-finance.html
- type: SmallBusiness
  url: https://www.comerica.com/small-business.html
- type: Commercial
  url: https://www.comerica.com/business.html
- type: WealthManagement
  url: https://www.comerica.com/wealth-management.html
- type: CashManagement
  url: https://www.comerica.com/business/solutions/cash-management.html
- type: CommercialInformationManagement
  url: https://www.comerica.com/business/solutions/cash-management/commercial-information-management.html
- type: OnlineBanking
  url: https://www.comerica.com/personal-finance/services/online-and-mobile-banking.html
- type: Blog
  url: https://www.comerica.com/insights.html
- type: Support
  url: https://www.comerica.com/site-tools/resources/contact-us.html
- type: PrivacyPolicy
  url: https://www.comerica.com/privacy-notice
- type: TermsOfService
  url: https://www.comerica.com/legal
- type: Security
  url: https://www.comerica.com/security-commitment
- type: FraudCenter
  url: https://www.comerica.com/fraud-center.html
- type: Investors
  url: https://investor.comerica.com/
- type: LinkedIn
  url: https://www.linkedin.com/company/comerica-bank
- type: DomainSecurity
  url: security/comerica-domain-security.yml
- type: LLMsTxt
  url: llms/comerica-llms.txt
- type: AggregatorPlaid
  url: https://plaid.com/institutions/
- type: AggregatorAkoya
  url: https://akoya.com/
- type: FDXStandard
  url: https://financialdataexchange.org/
- type: Acquirer
  url: https://www.53.com/
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
specificationVersion: '0.23'

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