Write a review

Head to head · Wearable and health app data · October 2026 research run

Terra API vs Validic Inform

Terra API scores 65.9 (B) on agent readiness against Validic Inform's 57.9 (C), and leads in 4 of 7 scored categories. Validic Inform leads on reliability, payments & pricing and transparency & trust. Both do wearable and health app data.

Best health record and wellness data APIs for AI agents · All 63 health comparisons

Terra APITerra Enabling Developers Inc. · HTTP API B65.9/100#327 of 1076 Validic InformValidic, Inc. (ChartSpan) · HTTP API C57.9/100#628 of 1076

Which one, for what

Terra API B

Best for A fitness, wellness, insurance or research product whose users connect consumer wearables and apps, and an agent that needs to read one user's sleep, activity or body data through MCP.

Ahead on

  • Schema & documentation, 89 against 75
  • Agent ergonomics, 78 against 50
  • Security & auth, 65 against 30

Also in its favour

  • A hosted endpoint, with nothing to install

Watch for

No free tier. Sign-up asks for a plan and billing details, and Quick Start starts at $499 a month with a 30-day money-back guarantee

Validic Inform C

Best 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 67
  • Payments & pricing, 40 against 20
  • Transparency & trust, 71 against 56

Watch for

The organisation token is sent as ?token= in the URL, the only documented option

Score by category

CategoryWeight this runTerra APIValidic InformEdge
Reliability16%206773Validic Inform +6
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.28975Terra API +14
Agent ergonomics13%16.27850Terra API +28
Security & auth14%17.56530Terra API +35
Payments & pricing10%12.52040Validic Inform +20
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.87574Terra API +1
Transparency & trust7%8.85671Validic Inform +15
Negative events≤1500
TotalB 65.9/100C 57.9/100

Facts side by side

FactTerra APIValidic Inform
KindHTTP APIHTTP API
VendorTerra Enabling Developers Inc.Validic, Inc. (ChartSpan)
Hosted endpointhttps://access.tryterra.co/api/v2/mcp/<user_id>no (local only)
TransportsHTTP, Streamable HTTPHTTP, SSE (legacy)
AuthOAuth or keyAPI key
PricingPay per useFreemium
x402nono
LicenceProprietary service under Terra's terms of service. The OpenAPI specs repository is Apache 2.0Proprietary service under Validic's Online Service Agreement for Inform (last updated 13 August 2025). The inform-quickstart sample apps are MIT
Tools exposed6none
Read-only variant documentednono
llms.txtyesyes
Last release2026-10-132026-10-12
Terms last updated2026-05-012025-08-13
Privacy policy last updated2023-04-202026-01-20
Customer content may train modelsnot found in the textnot found in the text
Terms restrict automated accessnot found in the textnot found in the text
Terms restrict benchmarkingyesyes
Terms or service can change without noticeyesnot found in the text
Arbitration or class-action waiveryesnot found in the text
Popularity13k npm/wk, 11k PyPI/wknone

Verdicts

Terra API

Graded on the Unified API and the Terra AI MCP server. A public OpenAPI 3.1 spec, llms.txt, per-user rate limits with Retry-After, and scoped admin tokens with approvals. Access starts at $499 a month with billing details at sign-up, the data API key has no scopes, and API key requests failed for 2 hours 38 minutes on 7 August 2026.

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.

Before you call either

Terra API

  1. Send dev-id and x-api-key headers on every Unified API and Terra AI call. A missing header returns 401 problem+json
  2. Keep each request window to 1,825 days or less and under 6,000 requested days per user an hour. On 429 with rule r2, wait Retry-After seconds
  3. Pass either fields or select to Terra AI tools, never both and never neither, or the call fails with a validation error
  4. Expect data by webhook after a user connects through the widget session. REST reads are for backfills and on-demand queries
  5. Use the Read only access level for the admin MCP server unless a change is needed. The MCP level can read API keys

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

Questions

Which is better for AI agents, Terra API or Validic Inform?

Terra API scores 65.9 (B) on agent readiness against Validic Inform's 57.9 (C), and leads in 4 of 7 scored categories. Validic Inform leads on reliability, payments & pricing and transparency & trust.

Do Terra API and Validic Inform need an API key?

Terra API takes an API key or an OAuth sign-in. Validic Inform needs an API key.

Can an agent call Terra API and Validic Inform without installing anything?

Terra API has a hosted endpoint at https://access.tryterra.co/api/v2/mcp/<user_id>. No hosted endpoint is listed for Validic Inform.

Other comparisons with Terra API or Validic Inform

Machine-readable

For companies

Do agents find, use and choose your tools?

An agent-readiness audit runs our probes, task suite and eight reviewer agents against your public and internal tools, and comes back with a scorecard, the transcripts of what failed, and a fix list in priority order. From $2,500, re-run included. We never take payment to move a rank. We do help companies earn one.

Get an auditSee a sample report