# Prosperity Bank

**Canonical:** https://apis.io/providers/prosperity-bank/  
**Website:** https://www.prosperitybankusa.com/  
**APIs profiled:** 0

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.

## Kin Score — 8.9 / 100 (minimal)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 8.9).

| Facet | Score |
|---|---|
| Discoverability | 57.4 |
| Contract Quality | 0.0 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 0.0 |
| Developer Ergonomics | 4.8 |
| Commercial Clarity | 21.1 |
| Access Clarity | 21.1 |

Regulatory layer — **Banking & Open Finance**: 17.7 (matched via tags).

## Agent readiness — 0.0 (human-only)

| Dimension | Value |
|---|---|
| Spec Presence | no |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | no |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | no |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## Security (1)

- **Prosperity Bank Domain Security** — TLSv1.3 · DNSSEC · DMARC

## Tags

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

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/prosperity-bank/). Scores are computed from the provider's own public artifacts under a published rubric.