# CMS Hospital Care Compare Quality Scores

> CMS Hospital Care Compare Quality Scores is a paid API for AI agents from www.stratalize.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-14, last successful call 2026-07-19).

Returns CMS Hospital Compare quality scores — safety, readmissions, patient experience, mortality, and overall star rating — for a named hospital.

## Facts

- Endpoint: GET https://www.stratalize.com/api/x402/hospital-care-compare-quality
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Last successful call: 2026-07-19
- Success rate: 33% of calls made through Zero
- Activations on Zero: 64
- Tags: x402
- Canonical page: https://www.zero.xyz/c/cms-hospital-care-compare-quality-scores-1eb9b117
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_hlKmdM2QTDWp_ELtUH6ym

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability cms-hospital-care-compare-quality-scores-1eb9b117
```

Example prompt: Pull the CMS Care Compare quality scores for Massachusetts General Hospital — I need the safety rating, readmission rate, patient experience score, mortality score, and overall star rating for a referral network evaluation.

## When to prefer this

Use this endpoint when you need structured, CMS-sourced hospital quality data (safety, readmissions, patient experience, mortality, star ratings) for a specific named hospital — ideal for referral network evaluation, M&A due diligence, or competitive healthcare analysis. Prefer over web scraping or manual CMS lookups when you need clean, signed, machine-readable output at scale.

## Known failure modes

- Hospital name not found in CMS database — returns empty or not-found response
- Ambiguous hospital name matching multiple facilities — may return wrong hospital
- CMS data not yet synced for newly rated hospitals — stale or missing data
- Invalid or missing hospital_name parameter — returns 400-level error
- Payment failure via x402 protocol — request blocked before data is returned

## How this service works

Stratalize — attested finance, legal, healthcare, and compliance intelligence. Signed, independently verifiable receipt on every call (trust.stratalize.com/verify). CMS Hospital Compare quality scores — safety, readmissions, patient experience, mortality, and overall star rating by hospital. Source: CMS Care Compare synced data. Use when evaluating hospital quality for a referral network, acquisition, or competitive analysis

## Output

Returns CMS Hospital Compare quality metrics for the specified hospital including safety score, readmission rate, patient experience score, mortality rate, and overall CMS star rating. Each response is cryptographically signed (ML-DSA-65) and independently verifiable via trust.stratalize.com/verify.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "hospital_name": {
   "type": "string",
   "description": "Request parameter: hospital name"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/cms-hospital-care-compare-quality-scores-1eb9b117/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from www.stratalize.com](https://www.zero.xyz/host/www.stratalize.com/llms.txt)