Overview
Wirable and Schema Source by Tabstack are two distinct tools that address different aspects of the modern web development and AI ecosystem. Wirable focuses on making web products compatible with AI agents by providing a comprehensive readiness score and automated fixes via a hosted MCP proxy. Schema Source, on the other hand, is a free utility that generates JSON Schema, Zod objects, or Pydantic models from any URL, enabling easy data extraction and validation.
Feature Comparison
| Feature | Wirable | Schema Source |
|---|---|---|
| Primary Function | Tests and improves AI agent readiness of web products | Generates JSON Schema for any URL |
| Target Users | Product teams, developers, companies | Developers, data scientists |
| Output | Agent-readiness score (0-100), MCP proxy | JSON Schema, Zod, Pydantic |
| Automation | Automated audits, drift monitoring, GitHub PRs | Caches schemas, API access |
| Integration | Hosted MCP proxy, no code changes | Copy-paste or API |
| Pricing | Free tier + $29/month Pro | Free |
| Dimensions | 6 dimensions (API, Auth, MCP, Errors, Idempotency, Docs) | Not applicable |
| Browser Interaction | Live browser audit | No browser interaction |
Pricing
Wirable: Free tier includes 3 full audits with N=3 agents and a shareable score. The Pro plan at $29/month offers unlimited audits, a hosted MCP proxy, drift monitoring, and GitHub fix PRs. This is ideal for teams that need ongoing agent compatibility assurance.
Schema Source: Completely free. No account or payment required. Schema Source is a free tool by Tabstack, backed by Mozilla. There are no usage limits mentioned, making it accessible for all developers.
Pros and Cons
Wirable
Pros:
- Comprehensive agent-readiness scoring with clear evidence
- Hosted MCP proxy fixes issues without code changes
- Drift monitoring ensures ongoing compatibility
- Free tier allows testing before commitment
Cons:
- Pro plan costs $29/month, which may be steep for small teams
- Focus is narrow: only for web products, not general data extraction
Schema Source
Pros:
- 100% free with no account needed
- Supports multiple output formats (JSON Schema, Zod, Pydantic)
- Fast and consistent results via URL pattern learning
- API access with no key required
Cons:
- Limited to schema generation; no agent readiness testing
- No scoring or improvement suggestions for AI compatibility
- May not handle dynamic or heavily JavaScript-rendered pages as well
Verdict
Choose Wirable if you need to test and improve your web product's compatibility with AI agents, with a clear score and automated fixes. Choose Schema Source if you need quick, free JSON Schema extraction from URLs for data validation or extraction tasks. Both serve different purposes: Wirable optimizes for agent readiness, while Schema Source simplifies data structuring.
Schema Source by Tabstack
Wirable