Send an MCP JSON-RPC request

Send a JSON-RPC 2.0 request to the OneSchema MCP server. MCP clients use
this endpoint to initialize the connection, list available tools and
resources, call read-only tools, and read resources.

Notifications that do not require a response return 202 Accepted with
an empty body. Requests return a JSON-RPC response object.

Recent Requests
Log in to see full request history
TimeStatusUser Agent
Retrieving recent requests…
LoadingLoading…
Body Params
string
enum
required

JSON-RPC protocol version

Allowed:

Request identifier. Omit for notifications.

string
required

JSON-RPC method, such as initialize, tools/list, tools/call, resources/list, or resources/read.

params
object

Method-specific parameters.

Responses

202

Notification accepted; no response body

401

Unauthorized (missing or invalid API key)

403

Forbidden

422

Request could not be processed

Language
Credentials
Header
URL
LoadingLoading…
Response
Choose an example:
application/json