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My Weird Prompts · Tuesday · 28 min

Mapping Undocumented APIs Without Breaking Them

API documentation is often treated as ground truth, but for builders constructing MCP servers, it is frequently outdated, incomplete, or aspirational. Probing what an API actually exposes requires a disciplined workflow rather than blind fuzzing. From generating OpenAPI specifications out of network captures using tools like mitmproxy2swagger to reading status code nuances and managing credential hygiene, this look into API mapping reveals how to reverse-engineer actual server behavior safely. Key sources: • README, v0.15.0, MIT — https://github.com/alufers/mitmproxy2swagger • README — https://github.com/nextafter-michael/unofficial-vwo-mcp-server • README — https://github.com/danielrosehill/Unofficial-MCP-Builder-Plugin Episode 6425 — myweirdprompts.com/n/6425 (permanent short link: myweirdprompts.com/023949) Listen on Android: MWP FM Player — myweirdprompts.com/apk

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API documentation is often treated as ground truth, but for builders constructing MCP servers, it is frequently outdated, incomplete, or aspirational. Probing what an API actually exposes requires a disciplined workflow rather than blind fuzzing. From generating OpenAPI specifications out of network captures using tools like mitmproxy2swagger to reading status code nuances and managing credential hygiene, this look into API mapping reveals how to reverse-engineer actual server behavior safely.

Key sources:
• README, v0.15.0, MIT — https://github.com/alufers/mitmproxy2swagger
• README — https://github.com/nextafter-michael/unofficial-vwo-mcp-server
• README — https://github.com/danielrosehill/Unofficial-MCP-Builder-Plugin

Episode 6425 — myweirdprompts.com/n/6425 (permanent short link: myweirdprompts.com/023949)

Listen on Android: MWP FM Player — myweirdprompts.com/apk

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