Developer infrastructure

Build with 3Stone.

Production APIs for accessibility testing, deployed-app exposure checks, and agent approval controls. Planned product APIs remain clearly labeled until their authentication, metering, and contracts are ready.

production example
POST /v1/shield/scan
Authorization: Bearer sk_shield_••••
Content-Type: application/json

{ "url": "https://example.com" }

200 OK  scan · findings · evidence
01
Production

Shield API

Find accessibility problems on your website and verify that they were fixed.

Scan a deployed webpage for automatically detectable accessibility issues, receive prioritized remediation guidance, and rescan to confirm changes.
Price
$49/mo
Included
500 calls included
Authentication
Bearer sk_shield_…
Base URL
shield-api.3stoneai.com
02
Production

Sentinel API

Check whether your live application is exposing data or secrets it should not.

Run read-only checks for anonymous Supabase access signals, missing RLS signals and secrets bundled into browser JavaScript.
Price
$49/mo
Included
1 monitored app
Authentication
Bearer sk_sentinel_…
Base URL
shield-api.3stoneai.com
03
Production

Ledger API

Require approval before an AI agent performs a risky action.

Record proposed agent actions, apply configurable risk thresholds, approve or reject held actions, and retain an independent outcome record.
Price
$29/mo
Included
1,000 actions included
Authentication
Bearer sk_ledger_…
Base URL
shield-api.3stoneai.com
Product APIs · Private beta

Bring 3Stone product engines into your own software.

These prices are the intended beta plans, not charges being collected today. Access opens only after authentication, tenant isolation, metering and product-specific terms pass review.

04
Private beta

Frontdesk API

Answer, qualify and route calls inside your own customer experience.

Planned surface: call events, structured lead records, routing outcomes and provider webhooks. Voice and SMS charges will be passed through separately.
$99/mo + usageSee the product →
05
100 analyses · Private beta

Picks API

Send a wager and receive a structured, research-backed analysis.

The customer product already runs the analysis engine. Public API access requires separate keys, metering and commercial data-use terms before launch.
06
100 guidance calls · Private beta

Counsel API

Add structured intake and self-guided preparation workflows to another product.

Informational preparation only—not legal, financial or licensed-professional advice. Public access will launch with workflow isolation and explicit jurisdiction metadata.
07
5,000 operations · Private beta

3Stone AI API

Connect operational records and workflows without replacing the customer’s interface.

Planned surface: customers, projects, invoices and workflow events. Write access will use narrow scopes and Ledger-compatible approval gates.

Want beta access? Email jathan@3stoneai.com with the API, use case and expected monthly volume.

Five-minute path

A predictable integration surface.

Choose a product, create a key through secure Stripe Checkout, store it server-side, and call the production endpoint. Responses are JSON and errors use standard HTTP status codes.

  1. 01
    Choose the narrow API

    Use Shield for accessibility, Sentinel for deployed-app exposure, or Ledger for agent control.

  2. 02
    Create and protect the key

    Keys are delivered once after checkout. Keep them in a server-side secret store.

  3. 03
    Run the public collection

    Import the Postman collection or use the OpenAPI contract from GitHub.

  4. 04
    Handle the result

    Use evidence and explicit statuses in your own workflow; never infer a guarantee the API does not make.