# AgentCast

> Use this tool when you need to extract and validate structured data from large language models (LLMs) to ensure reliable and accurate output. AgentCast solves the problem of unstructured text output from LLMs by providing a suite of tools to extract JSON data, validate it against specifications, and generate corrective prompts. It takes LLM text output as input and produces validated JSON data and retry prompts as output, making it ideal for applications requiring structured data extraction.

Canonical page: https://skillsregistry.net/skills/mukundakatta-agentcast  
JSON: https://api.skillsregistry.net/v1/skills/mukundakatta-agentcast

## Description

AgentCast MCP server enforces structured output by extracting JSON from LLM text, validating it against shape specifications, and generating corrective retry prompts. It provides three tools — extract_json, validate_response, and build_retry_prompt — for reliable structured data extraction.

## Trust

- **Trust score (0–1):** 0.65
- **Verification tier:** scanned
- **Last scanned:** 2026-09-02

## Facts

- **Version:** 1.0.0
- **Skill type:** atomic
- **Execution layer:** mcp-remote
- **Runtime environment:** api
- **Category:** ai-ml
- **Updated:** 2026-09-02

## Source

- **Source listing:** [PulseMCP](https://www.pulsemcp.com/servers/mukundakatta-agentcast)
- **Repository:** <https://github.com/mukundakatta/agentcast-mcp>

## Use it

Resolve this record through the SkillsRegistry MCP server (no auth, read-only):

```
claude mcp add --transport http --scope user skillsregistry https://api.skillsregistry.net/mcp
```

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "get_skill",
    "arguments": {
      "slug": "mukundakatta-agentcast"
    }
  }
}
```

REST: `GET https://api.skillsregistry.net/v1/skills/mukundakatta-agentcast` · pull for local use: `GET https://api.skillsregistry.net/v1/skills/mukundakatta-agentcast/pull`

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SkillsRegistry indexes agent skills from public registries and GitHub. Skills we have analysed are scanned with Circle-IR and scored on six dimensions; each listing states its scan coverage. More: https://skillsregistry.net/llms.txt