JsonPlace MCP - Fake JSON and Mock APIs Inside Your MCP Client

Measured conclusion: Deep-tested. L2 outcome: tools_ok.

Add to your agent

Copy this into your MCP client config:

{
  "mcpServers": {
    "JsonPlace MCP - Fake JSON and Mock APIs Inside Your MCP Client": {
      "url": "https://jsonplace.com/mcp",
      "transport": "streamable-http"
    }
  }
}

Measured tools (18)

• jsonplace_whoami

  Return the current JsonPlace MCP auth mode, capabilities, and user profile when available.

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• jsonplace_list_field_options

  List canonical field options exposed by JsonPlace, optionally filtered by group.

  Parameters:

  • group — string
  • limit — integer

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• jsonplace_search_field_options

  Search canonical field options by key, alias, label, or tags.

  Parameters:

  • query (required) — string
  • limit — integer

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• jsonplace_quickstart

  Return short JsonPlace MCP recipes for field discovery, JSON generation, and endpoint creation.

  Parameters:

  • topic — string

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• jsonplace_generate_json

  Generate one or more JSON payloads from JsonPlace field definitions.

  Parameters:

  • fields (required) — array
  • sampleCount — integer

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• jsonplace_infer_fields_from_json

  Infer JsonPlace field definitions from a single example JSON object.

  Parameters:

  • json (required)

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• jsonplace_list_templates

  List saved templates for the authenticated JsonPlace user. Requires an API key.

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• jsonplace_save_template

  Save a new template to the authenticated JsonPlace account. Requires an API key.

  Parameters:

  • title (required) — string
  • fields (required) — array
  • description — string

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• jsonplace_delete_template

  Delete one saved JsonPlace template. Requires an API key.

  Parameters:

  • templateId (required) — string

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• jsonplace_list_mock_endpoints

  List saved mock endpoints for the authenticated JsonPlace user. Requires an API key.

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• jsonplace_create_template_endpoint

  Create a template-backed JsonPlace mock endpoint. Works anonymously or with an API key.

  Parameters:

  • title (required) — string
  • endpointPath (required) — string
  • fields (required) — array
  • description — string

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• jsonplace_create_static_endpoint

  Create a static JsonPlace mock endpoint. Works anonymously or with an API key.

  Parameters:

  • title (required) — string
  • endpointPath (required) — string
  • responseJson (required)
  • description — string

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• jsonplace_update_template_endpoint

  Update one saved template-backed JsonPlace mock endpoint. Requires an API key.

  Parameters:

  • endpointId (required) — string
  • title (required) — string
  • endpointPath (required) — string
  • fields (required) — array
  • description — string

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• jsonplace_update_static_endpoint

  Update one saved static JsonPlace mock endpoint. Requires an API key.

  Parameters:

  • endpointId (required) — string
  • title (required) — string
  • endpointPath (required) — string
  • responseJson (required)
  • description — string

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• jsonplace_create_mock_endpoint

  Legacy polymorphic endpoint creator. Prefer jsonplace_create_template_endpoint or jsonplace_create_static_endpoint. Works anonymously or with an API key.

  Parameters:

  • title (required) — string
  • endpointPath (required) — string
  • fields — array
  • sourceType — string
  • description — string
  • responseJson

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• jsonplace_update_mock_endpoint

  Legacy polymorphic endpoint updater. Prefer jsonplace_update_template_endpoint or jsonplace_update_static_endpoint. Requires an API key.

  Parameters:

  • endpointId (required) — string
  • title (required) — string
  • endpointPath (required) — string
  • fields — array
  • sourceType — string
  • description — string
  • responseJson

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• jsonplace_delete_mock_endpoint

  Delete one saved JsonPlace mock endpoint. Requires an API key.

  Parameters:

  • endpointId (required) — string

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• jsonplace_get_public_mock_response

  Resolve the current JSON payload for a JsonPlace public mock endpoint using a username or public namespace.

  Parameters:

  • endpointPath (required) — string
  • owner — string
  • username — string

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

Measured by MCPYP probing. Untested fields are omitted, never estimated. Listing is always free; MCPYP never proxies calls or stores user tokens.