Prosperity Bank

Prosperity Bank is a Texas-chartered commercial bank (member FDIC, NMLS ID 466414) and the banking subsidiary of Prosperity Bancshares, Inc. (NYSE: PB), a Houston, Texas based regional financial holding company with roughly $37-43 billion in total assets and 300-plus full-service branches across Texas and central Oklahoma. It offers consumer and commercial banking, treasury management, mortgage, and wealth services, and has grown largely through acquisitions (LegacyTexas, Lone Star State Bancshares, American Bank Holding, Southwest Bancshares, Stellar Bancorp). On open finance, Prosperity Bank operates no first-party public developer portal or documented API: developer. and api. subdomains do not resolve, and no /developers or /api pages exist. Consumer-permissioned account and transaction data is reachable only through third-party aggregators (Finicity/Mastercard Open Banking, Plaid, and similar), not a directly published bank API. No FDX-conformant data-access API or CFPB Section 1033 posture is publicly documented by the bank as of this review.

Prosperity Bank is profiled on the APIs.io network. Tagged areas include Financial-Services, Banking, United States, Regional Bank, and Texas.

Prosperity Bank’s developer surface includes support and 6 more developer resources.

🌐 Visit website 📡 Source on GitHub

8.9/100 minimal ▬ flat Agent 0/100 human only saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

0 APIs

Financial-Services Banking United States Regional Bank Texas Open Finance Data Aggregation

Kin Score

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

Composite quality — 8.9/100 · minimal

Contract Quality 0.0 / 21

Developer Ergonomics 0.8 / 17

Access Clarity 3.6 / 17

Operational Transparency 0.0 / 11

Contract Governance 0.0 / 10

Discoverability 4.9 / 9

Regulatory Posture 2.7 / 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/prosperity-bank: 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.

Prosperity Bank Domain Security

TLSv1.3 · DNSSEC · DMARC

SECURITY

Resources

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support

Support

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

LinkedIn

Source (apis.yml)

aid: prosperity-bank
url: https://raw.githubusercontent.com/api-evangelist/prosperity-bank/refs/heads/main/apis.yml
name: Prosperity Bank
kind: company
description: 'Prosperity Bank is a Texas-chartered commercial bank (member FDIC, NMLS ID 466414) and the banking subsidiary
  of Prosperity Bancshares, Inc. (NYSE: PB), a Houston, Texas based regional financial holding company with roughly $37-43
  billion in total assets and 300-plus full-service branches across Texas and central Oklahoma. It offers consumer and commercial
  banking, treasury management, mortgage, and wealth services, and has grown largely through acquisitions (LegacyTexas, Lone
  Star State Bancshares, American Bank Holding, Southwest Bancshares, Stellar Bancorp). On open finance, Prosperity Bank operates
  no first-party public developer portal or documented API: developer. and api. subdomains do not resolve, and no /developers
  or /api pages exist. Consumer-permissioned account and transaction data is reachable only through third-party aggregators
  (Finicity/Mastercard Open Banking, Plaid, and similar), not a directly published bank API. No FDX-conformant data-access
  API or CFPB Section 1033 posture is publicly documented by the bank as of this review.'
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:
  - security
  generated: '2026-09-02'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
tags:
- Financial-Services
- Banking
- United States
- Regional Bank
- Texas
- Open Finance
- Data Aggregation
tags_raw:
- Financial Services
- Banking
- United States
- Regional Bank
- Texas
- Open Finance
- Data Aggregation
created: '2026-07-23'
modified: '2026-07-23'
specificationVersion: '0.23'
apis: []
common:
- type: DomainSecurity
  url: security/prosperity-bank-domain-security.yml
- type: LLMsTxt
  url: llms/prosperity-bank-llms.txt
- type: Website
  url: https://www.prosperitybankusa.com/
- type: LinkedIn
  url: https://www.linkedin.com/company/prosperity-bank
- type: TermsOfService
  url: https://www.prosperitybankusa.com/terms-of-use
- type: PrivacyPolicy
  url: https://www.prosperitybankusa.com/privacy
- type: Support
  url: https://www.prosperitybankusa.com/contact-us
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

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