# Validic Inform vs Zus Health

> Validic Inform scores 57.9 (C) to Zus Health's 56.6 (C) for patient consent. Prices, MCP, x402, uptime and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/validic-vs-zus-health
- Markdown: https://www.anchorterminal.com/compare/validic-vs-zus-health.md (~2,200 tokens)
- Slim: https://www.anchorterminal.com/compare/validic-vs-zus-health.min.md (~630 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/validic-vs-zus-health.json (this page as data, same URL with Accept: application/json)
- Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- Updated: 2026-10-14

Validic Inform scores 57.9 (C) on agent readiness against Zus Health's 56.6 (C), and leads in 4 of 7 scored categories. Zus Health leads on agent ergonomics and security & auth. Both do patient consent.

- Validic Inform: grade C, 57.9/100, rank #628 of 1076. Markdown https://www.anchorterminal.com/tools/validic.md · JSON https://www.anchorterminal.com/api/v1/tools/validic.json
- Zus Health: grade C, 56.6/100, rank #669 of 1076. Markdown https://www.anchorterminal.com/tools/zus-health.md · JSON https://www.anchorterminal.com/api/v1/tools/zus-health.json
- Best health record and wellness data APIs for AI agents: https://www.anchorterminal.com/best/health-data/index.md
- All 63 health comparisons: https://www.anchorterminal.com/compare/health-data/index.md

## Which one, for what

### Validic Inform (C)

Good for: A remote patient monitoring or wellness app that needs normalised readings from many wearables and home devices, and an agent that wants to start building without a sales call.

Ahead on:
- Reliability, 73 against 66
- Payments & pricing, 40 against 5
- Maintenance & community, 74 against 64
- Transparency & trust, 71 against 59

Watch for: The organisation token is sent as `?token=` in the URL, the only documented option

### Zus Health (C)

Good for: US care organisations and digital health builders that want a shared, continuously refreshed patient profile in FHIR with EHR embedding.

Ahead on:
- Agent ergonomics, 67 against 50
- Security & auth, 49 against 30

Watch for: No public prices, and the sandbox is requested through a Google Form


## Score by category

| Category | Weight | Validic Inform | Zus Health | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 73 | 66 | Validic Inform +7 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 75 | 77 | Zus Health +2 |
| Agent ergonomics | 13% (16.2 this run) | 50 | 67 | Zus Health +17 |
| Security & auth | 14% (17.5 this run) | 30 | 49 | Zus Health +19 |
| Payments & pricing | 10% (12.5 this run) | 40 | 5 | Validic Inform +35 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 74 | 64 | Validic Inform +10 |
| Transparency & trust | 7% (8.8 this run) | 71 | 59 | Validic Inform +12 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **57.9 · C** | **56.6 · C** | |

## Facts side by side

| Fact | Validic Inform | Zus Health |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Validic, Inc. (ChartSpan) | Zus Health, Inc. |
| Hosted endpoint | no (local only) | no (local only) |
| Transports | HTTP, SSE (legacy) | HTTP |
| Auth | API key | OAuth |
| Pricing | Freemium | Paid |
| x402 | no | no |
| Licence | Proprietary service under Validic's Online Service Agreement for Inform (last updated 13 August 2025). The inform-quickstart sample apps are MIT | Proprietary service under the Zus Builder Terms of Service (last updated 11 March 2025), the Developer Sandbox Terms and the Zus Business Associate Addendum |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| Last release | 2026-10-12 | 2026-10-14 |
| Terms last updated | 2025-08-13 | 2025-03-11 |
| Privacy policy last updated | 2026-01-20 | 2026-06-24 |
| Customer content may train models | not found in the text | not found in the text |
| Terms restrict automated access | not found in the text | not found in the text |
| Terms restrict benchmarking | yes | not found in the text |
| Terms or service can change without notice | not found in the text | not found in the text |
| Arbitration or class-action waiver | not found in the text | not found in the text |

## Verdicts

**Validic Inform.** Graded on the Inform REST and Streaming APIs. An agent can create a free developer account through a sign-up API, with only an emailed code needing a person's inbox, and llms.txt plus agent guides document every step. The organisation token travels in the URL query string, the free tier holds synthetic data only, and production access needs an Enterprise contract.

**Zus Health.** FHIR R4 over an aggregated patient profile drawn from CommonWell, Carequality, Surescripts, Quest and ADT networks, with published rate limits, a 99.5 per cent SLA and a dated changelog. Accounts and sandboxes are provisioned by Zus on request, with no public prices, no named security certification and no SDK.

## Before you call either

### Validic Inform

1. Show the developer the free-tier terms and wait for acceptance before calling `POST /auth/register`
2. Send `Authorization: <id_token>` to sign-up calls, but pass the organisation token as `?token=` on Inform calls
3. Use the customer `uid` in URLs, never Validic's internal `id`, which returns a silent 404
4. Keep date ranges to 30 days or less and page month by month for backfills
5. Unwrap `data` on list responses and treat an empty array as normal on a new account

### Zus Health

1. Cache the access token for its hour. More than 200 token requests an hour per App Client returns 429
2. Request Patient History at most once per patient per 24 hours, and poll the job status endpoint
3. Use conditional create by identifier so a retried write doesn't duplicate a resource
4. Send `Zus-If-Match` with the resource's ETag on PUT and PATCH
5. Set `_count` up to 500 on searches, since the default page is 10

## Questions

### Which is better for AI agents, Validic Inform or Zus Health?

Validic Inform scores 57.9 (C) on agent readiness against Zus Health's 56.6 (C), and leads in 4 of 7 scored categories. Zus Health leads on agent ergonomics and security & auth.

### Do Validic Inform and Zus Health need an API key?

Validic Inform needs an API key. Zus Health uses an OAuth sign-in.

### Can an agent call Validic Inform and Zus Health without installing anything?

No hosted endpoint is listed for Validic Inform. No hosted endpoint is listed for Zus Health.


## For agents

- This comparison as JSON: https://www.anchorterminal.com/compare/validic-vs-zus-health.json, and with the fewest tokens: https://www.anchorterminal.com/compare/validic-vs-zus-health.min.md
- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "validic", "b": "zus-health"}`. From a terminal: `anchor compare validic zus-health`
- Each listing in full: https://www.anchorterminal.com/api/v1/tools/validic.json and https://www.anchorterminal.com/api/v1/tools/zus-health.json

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