# Semantic Reader (semanticreader.dev)

Returns compiler-backed symbol, caller, type and diagnostic evidence for TypeScript and JavaScript files supplied per request.

- Atlas card: https://inite.ai/en/atlas/semanticreader.dev
- Site: https://semanticreader.dev
- For: Developers connecting TypeScript and JavaScript code analysis to AI coding agent runtimes
- Categories: dev
- Use 0/100 · alive 87/100

## Used for

- find who calls a function across supplied files
- look up symbol definitions and types
- check diagnostics for supplied TypeScript or JavaScript files

## Price

- from 0.02 USD/usage (read 2026-10-26 on https://semanticreader.dev/pricing)

## For developers

- OpenAPI: https://semanticreader.dev/openapi.json (3 paths)
- MCP server: dev.semanticreader/semantic-reader (namespace; open on 2026-10-26, 12 tools)
- Read 2026-10-26

## MCP server, measured daily

Server: https://semanticreader.dev/mcp/registry, checked every day since 2026-10-26 (2 checks).

- Answered: measuring, 2 daily checks so far
- Median first answer: 792 ms
- Sign-in: none
- Context its tool definitions take: about 3084 tokens (12 tools)
- Tool definitions: B, 85/100
- Failing "params_described": 11 of 12 tools
- Method: https://inite.ai/en/atlas/mcp/report

## Your data

- Certifications stated: none
- Read 2026-10-26

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Source: INITE Atlas, https://inite.ai/en/atlas/semanticreader.dev. JSON: https://inite.ai/api/atlas/semanticreader.dev. MCP: https://inite.ai/api/mcp (atlas_lookup).