jsonv-tsCAUTION
JSON Schema builder and validator for TypeScript with static type inference, Hono middleware for OpenAPI generation and validation, and MCP server/client implementation. Lightweight, dependency-free, and built on Web Standards.
Overview
From the repository's own README, as read at the audited commit. Badges and raw HTML are left out.
[](https://npmjs.org/package/jsonv-ts)
- Installation
- Example
- Motivation
- Schema Types
- Strings
- Numbers
- Integers
- Booleans
- Literals
- Arrays
- Objects
- Strict Object
- Partial Object
- Record
- Unions
- Any
- From Schema
- References
- Custom Schemas
- Utilities
- TypeScript Type Generation
- Hono Integration
- Validator Middleware
- OpenAPI generation
- MCP
- Hono MCP Middleware
- Hono Routes as MCP Tools
- MCP Client
- Validation
- Integrated Validator
- Using Standard Schema
- Using ajv
- Using @cfworker/json-schema
- Using json-schema-library
- Development
- License
- Acknowledgements
A simple, lightweight and depe
a70a467db194OBSERVED · 2026-10-10Connect
Built from this server's own package name, version and transport as found in its source — not copied from anyone's documentation, so it cannot drift against a page we do not control.
claude mcp add jsonv-ts -- npx -y [email protected]
{
"mcpServers": {
"jsonv-ts": {
"command": "npx",
"args": [
"-y",
"[email protected]"
]
}
}
}Exposed tools (4)
3 read · 1 write · 0 destructive.
| Tool | Risk | Description |
|---|---|---|
add | write | |
get | read | MCP GET description |
headers | read | |
test | read |
Trust audit
CAUTIONgrade B · trust 89/100 Install with care. The audit found things worth knowing before you trust its output.
| Layer | What it checks | Result |
|---|---|---|
| L0 | Provenance & inventory | PASS |
| L1 | Static analysis of the code | WARN |
| L2 | Instruction surface (what it tells the agent) | PASS |
| L3 | Class-specific surface | WARN |
| L4 | Behavioural (sandbox) | SKIPPED |
What the source does
- Filesystem
- none-observed
- Network
- none-observed
- Shell
- none-observed
- Dependencies
- not all pinned
- Secrets in source
- none-found
Findings (9)
console.log("🏃♂️ Running baseline performance benchmark...");streamable-http
.prettierignore
import * as s from "../../lib";
import * as s from "../../lib";
import { describeRoute, validator } from "../../hono";import { parse, s } from "../../lib";import * as s from "../../lib";
@cfworker/json-schema, @modelcontextprotocol/sdk, @sinclair/typebox, @standard-schema/spec, @types/bun, @types/lodash-es, ajv, bun-types
Gates applied: no_behavioural_pass.
a70a467db194full audit observations/trust-audit/mcp-server/dswbx__jsonv-ts.json · Report an issue / request a re-scanAudit history
Every audit this server has had. A grade with a past is a grade somebody is still checking.
| Date | Source | Verdict | Grade | Score | Change |
|---|---|---|---|---|---|
| 2026-10-10 | a70a467db194 | CAUTION | B | 89 | first audit |
Questions
What is the jsonv-ts MCP server?
JSON Schema builder and validator for TypeScript with static type inference, Hono middleware for OpenAPI generation and validation, and MCP server/client implementation. Lightweight, dependency-free, and built on Web Standards.
What tools does jsonv-ts expose?
4 in total: 3 read-only, 1 that write, and 0 that can delete or overwrite. Every one is listed on this page with its risk.
Is jsonv-ts safe to connect to an agent?
With care. The audit graded it B (89/100) and found 9 things worth knowing before you trust this server, listed below with the exact line each was found on.
What credentials does jsonv-ts need?
No credential environment variables were found in its source, so it appears to need none.
How does jsonv-ts run?
It speaks streamable-http, so it runs as a service you connect to over the network. It is published on npm as jsonv-ts at 0.11.1.
How current is this page?
The grade is for one exact copy of the source (a70a467db194), read on 2026-10-10. The repository is watched and re-audited when it changes.