mcp-replay is a static-page renderer for JSON-RPC traces recorded by
mcp-tape — the stdio proxy that wraps any MCP server and writes every message to a replayable .jsonl file. Drop a trace URL in, see exactly what tools your agent called, with what arguments, and what they returned.
?trace=<url> for one trace,
?trace=<a>;<b>;… to merge several by timestamp.
Traces must be reachable via HTTPS or same-origin.
Every JSON-RPC message, ordered. Click to expand the raw payload.
Which tools your agent called, how often, how long they took, how often they errored.
Each tools/call request paired with its response, with latency and full arguments.
The JSONL itself, line-numbered. The format is documented and stable.