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Path	Synopsis
client Package client provides an HTTP client with automatic 402 Payment Required handling.	Package client provides an HTTP client with automatic 402 Payment Required handling.
internal
mpptest Package mpptest builds and formats MPP Challenges and Credentials for tests, panicking where the mpp functions return an error.	Package mpptest builds and formats MPP Challenges and Credentials for tests, panicking where the mpp functions return an error.
tempoproof Package tempoproof holds the rule shared by the HTTP and MCP clients and the Tempo charge client for zero-amount Tempo proofs: a proof authenticates the payer at the realm the challenge names, so a client signs one only for a realm the server that sent the challenge owns.	Package tempoproof holds the rule shared by the HTTP and MCP clients and the Tempo charge client for zero-amount Tempo proofs: a proof authenticates the payer at the realm the challenge names, so a client signs one only for a realm the server that sent the challenge owns.
mcp
client Package client pays for MCP tool calls made with the official MCP Go SDK (github.com/modelcontextprotocol/go-sdk), matching mppx's McpClient.wrap.	Package client pays for MCP tool calls made with the official MCP Go SDK (github.com/modelcontextprotocol/go-sdk), matching mppx's McpClient.wrap.
internal/payment Package payment holds the MCP payment flow shared by the MCP SDK and raw JSON-RPC server integrations: reading the Credential from _meta, running the charge, and building the payment error.	Package payment holds the MCP payment flow shared by the MCP SDK and raw JSON-RPC server integrations: reading the Credential from _meta, running the charge, and building the payment error.
jsonrpc Package jsonrpc charges for MCP tool calls handled as raw JSON-RPC messages, without an MCP SDK, matching mppx's raw MCP server transport (Transport.mcp()):	Package jsonrpc charges for MCP tool calls handled as raw JSON-RPC messages, without an MCP SDK, matching mppx's raw MCP server transport (Transport.mcp()):
server Package server charges for MCP tools served with the official MCP Go SDK (github.com/modelcontextprotocol/go-sdk), matching the mppx/mcp/server transport (Transport.mcpSdk):	Package server charges for MCP tools served with the official MCP Go SDK (github.com/modelcontextprotocol/go-sdk), matching the mppx/mcp/server transport (Transport.mcpSdk):
mpp Package mpp implements the Machine Payments Protocol (MPP) types and header serialization for Go.	Package mpp implements the Machine Payments Protocol (MPP) types and header serialization for Go.
server Package server provides the generic challenge-or-verify flow for Payment authentication on the server side.	Package server provides the generic challenge-or-verify flow for Payment authentication on the server side.
echo Package echoadapter provides Echo middleware for MPP-protected routes.	Package echoadapter provides Echo middleware for MPP-protected routes.
fiber Package fiberadapter provides Fiber middleware for MPP-protected routes.	Package fiberadapter provides Fiber middleware for MPP-protected routes.
gin Package ginadapter provides Gin middleware for MPP-protected routes.	Package ginadapter provides Gin middleware for MPP-protected routes.
tempo Package tempo contains the Tempo-specific charge method built on top of the generic pkg/client and pkg/server HTTP 402 flow, including request helpers, attribution utilities, and replay stores for single-process and Redis-backed deployments.	Package tempo contains the Tempo-specific charge method built on top of the generic pkg/client and pkg/server HTTP 402 flow, including request helpers, attribution utilities, and replay stores for single-process and Redis-backed deployments.
client Package chargeclient contains the Tempo charge client method for creating Payment Credentials that satisfy Tempo HTTP 402 Challenges.	Package chargeclient contains the Tempo charge client method for creating Payment Credentials that satisfy Tempo HTTP 402 Challenges.
internal/rpccache Package rpccache reuses the Tempo JSON-RPC clients that the charge client and server build from URLs, so each is built once rather than per request.	Package rpccache reuses the Tempo JSON-RPC clients that the charge client and server build from URLs, so each is built once rather than per request.
server Package chargeserver contains the Tempo charge server method and verifier.	Package chargeserver contains the Tempo charge server method and verifier.