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Structured-output enforcer: extract and validate JSON from messy LLM text.

Connector by MukundaKatta · GitHub account verified by the MCP Registry

IndexedMITLocal (stdio)★ 1
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Works with Claude Code, Codex, VS Code, Cursor, Windsurf, Claude Desktop. Read the repository before you give any tool access to your data.

npx agentmarket install connector/mukundakatta-agentcast

Asks which of your tools to add it to (Claude Code, Codex, Cursor, VS Code, Windsurf, Gemini CLI, Claude Desktop) and shows the change first. See https://agentmart.dev/cli.

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About

Structured-output enforcer: extract and validate JSON from messy LLM text.

Reviews

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Permissions

What this server can do and what it asks for, from its tool list and install config. Checked Oct 25, 2026.

Tools
2 read · 1 write · 0 delete
Secrets
None asked for
Install scripts
Not scanned yet
Runs as
Node.js package

Tools by what they do 3

Read from the source code; the running server may list different tools.

Read 2 · Look things up without changing anything.

  • extract_json
  • validate_response

Write 1 · Create, change, send or run things.

  • build_retry_prompt

Tools (3)

Read from the source code; the running server may differ. Descriptions are the server’s own words; hidden characters are shown as [U+…].

  • build_retry_prompt

    Given an attempt history, produce the retry feedback message agentcast would append to the conversation when the model returned the wrong shape. Codifies the "validation error as feedback" pattern for non-Node MCP clients.

  • extract_json

    Pull a JSON value out of messy LLM output. Tries the whole text, then a fenced ```json``` block, then the largest balanced {...}/[...] substring. Returns the parsed value plus which strategy succeeded.

  • validate_response

    Validate a parsed JSON value against an agentcast shape spec. Spec maps field name to type: 'string', 'number', 'boolean', 'array', 'object'. Suffix with '?' for optional. Returns valid=true on success, or valid=false with a human-readable error string suitable for retry feedback.

Signals

Stars
1
Forks
0
Open issues
0
Weekly downloads
18
Last commit
Jun 13, 2026 (4 months ago)
Last release
Apr 27, 2026 (6 months ago)
Last package publish
Apr 27, 2026 (6 months ago)

From GitHub (fetched Oct 24, 2026) and the package registry.

Details

Registry name
io.github.MukundaKatta/agentcast
Version
0.1.0
Auth
No auth
Packages
npm @mukundakatta/agentcast-mcp
License
MIT
Repository
github.com/MukundaKatta/agentcast-mcp
Website
github.com/MukundaKatta/agentcast-mcp
First seen
Oct 24, 2026
Last checked
Oct 24, 2026
Source
Official MCP Registrygithub-graphql

More from MukundaKatta

Cite this page

Agentcast MCP server. Agent Mart. https://agentmart.dev/connectors/mukundakatta-agentcast (last updated 2026-10-24)