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Check a WordPress MCP connection in layers: confirm which server implementation you installed and its exact endpoint, test basic HTTPS access from the AI client’s environment, then verify MCP initialization, tool discovery, authorization, and a real tool call. An HTTP response alone does not prove the MCP connection works.
Identify the WordPress MCP server and endpoint
“WordPress MCP” can mean different services. Use the endpoint and transport for the implementation actually configured in your AI client; paths and credentials are not interchangeable.
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| Implementation | Endpoint or transport | Authentication and location notes |
|---|---|---|
| WordPress.com hosted MCP | https://public-api.wordpress.com/wpcom/v2/mcp/v1 | Uses browser-based OAuth 2.1. MCP must be enabled and the account or site must be eligible. WordPress.com also documents this endpoint for eligible self-hosted sites connected through Jetpack. |
| Official self-hosted WordPress MCP Adapter | By default, the site’s /wp-json/mcp/mcp-adapter-default-server path; supports remote HTTP and local WP-CLI STDIO. |
For remote HTTP, the site must be reachable from the AI client’s environment. A loopback or local-only address cannot be reached by a client running elsewhere. |
Automattic’s separate wordpress-mcp project |
Documents /wp-json/wp/v2/wpmcp/streamable for direct Streamable HTTP, as well as a proxy-based STDIO option. |
Its guide describes JWT for direct Streamable HTTP and proxy-based alternatives. Follow that project’s credential and transport setup. |
WordPress.com’s eligibility and connection requirements are described in its MCP documentation. The Adapter’s setup guide documents its default server and transports; its separate troubleshooting guide covers HTTP sessions. Automattic’s wordpress-mcp setup and transport details are in its project documentation. Check those guides if an endpoint or requirement has changed.
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Test the connection one layer at a time
- Compare the configured URL. Match the scheme, hostname, and full path with the endpoint for your implementation. For WordPress.com, confirm MCP is enabled and the account or site is eligible. For the Adapter, confirm the plugin is installed and active and that the default server is available.
- Test access from the client’s environment. Check that the hostname resolves, HTTPS/TLS negotiation succeeds, and the host responds. A browser or basic HTTP probe can help narrow down DNS, certificate, firewall, proxy, or hosting-access problems. It does not establish that the MCP endpoint accepts the protocol handshake.
- Complete MCP initialization. For the Adapter’s HTTP transport, send an MCP
initializerequest to the configured endpoint before sending other MCP requests. The Adapter documentation states: “Every HTTP client must complete an initialization handshake before sending any other MCP request:” See its HTTP transport guide for the request format. - Keep the Adapter session ID. After initialization, include the returned
Mcp-Session-Idon every subsequent HTTP request. If a session expires, initialize again to obtain a fresh one. - Check tool discovery. Ask the client to list the server’s available tools using its normal MCP workflow. If initialization succeeds but expected tools are missing, inspect server-side tool or ability settings and the client’s logs. For WordPress.com, restart the client after changing enabled tools so it refreshes the list.
- Check authorization and execution. For WordPress.com, complete the browser-based OAuth 2.1 flow and confirm the client appears under Connected Apps. For the Adapter, WordPress permission checks can deny an ability even when it is discoverable. For Automattic’s separate project, use credentials that match the selected transport.
- Inspect logs and record the failure point. WordPress.com recommends restarting the client and checking its logs. Note the endpoint, time, HTTP status, and protocol error; redact bearer tokens, passwords, and other secrets before sharing logs.
Interpret what the result means
- No DNS, TLS, or HTTP response: the failure occurs before MCP negotiation. Check the hostname, network route, TLS certificate, firewall or proxy policy, and whether the service is exposed to the client’s environment.
- HTTP responds, but initialization fails: verify that the path belongs to the installed implementation, that the client is using a supported transport, and that required authentication is present.
- Initialization works, but Adapter requests report a session error: send the
Mcp-Session-Idreturned at initialization. If the session has expired, initialize again. - Tools appear, but a call is denied: investigate OAuth and account connection for WordPress.com or the applicable WordPress user permissions for the Adapter. Discovery does not grant permission to execute every tool.
- Expected tools are absent: check which tools or abilities the server exposes, refresh discovery by restarting the client where applicable, and inspect client and server logs.
What counts as reachable?
Use “reachable” precisely when reporting a connection problem. These are separate milestones: the host responds over HTTPS; the MCP endpoint completes initialization; the expected tools are discovered; and an authorized tool call succeeds. Record the highest milestone reached rather than treating any HTTP response as proof of a working MCP connection.
Quick Recap
Bestseller No. 1
Bestseller No. 2
Best Value
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GMKtec EVO-X3 AI Mini Pc Ryzen AI Max+ 395 128GB LPDDR5X 2TB PCIe 4.0 SSD
- AMD RYZEN AI MAX+ 395 MINI PC – THE NEXT GENERATION AI WORKSTATION --- GMKtec EVO-X3 introduces the next evolution of desktop AI computing powered by AMD Ryzen AI Max+ 395 processor. Featuring 16 cores and 32 threads, Zen 5 architecture, TSMC 4nm FinFET process, up to 5.1GHz boost frequency, and 64MB L3 cache, EVO-X3 delivers flagship-level performance for AI applications, professional creation, gaming, and demanding multitasking. With up to 126 TOPS AI performance, this compact AI workstation brings powerful local computing to your desktop.
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GMKtec EVO-X2 AI Mini PC AMD Ryzen Al Max+ 395 Up to 5.1GHz, 16C/32T
- EVOLUTION AMD RYZEN AI MAX+ 395 MINI PC - GMKtec EVO-X2 is the next evolution in AI mini PC Ryzen Strix Halo series. Thanks to AMD Simultaneous Multithreading (SMT) the core-count is effectively doubled, to 32 threads. Ryzen AI Max+ 395 has 64 MB of L3 cache and can boost up to 5.1 GHz, depending on the workload. The Ryzen AI Max+ 395 is currently rated as the "most powerful x86 APU" on the market for AI computing.
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#1 Best Overall
BOSGAME M5 AI Mini PC, AMD Ryzen AI Max+ 395 128GB LPDDR5X 8000MT/S
- ▶ FLAGSHIP AMD RYZEN AI MAX+ 395 MINI PC – Packing 16 Zen 5 cores, 32 threads (via SMT), 64MB L3 cache, and a 5.1GHz boost clock. Delivers 126 TOPS total AI compute – including a 50 TOPS XDNA 2 NPU, 25% above Microsoft Copilot+ standard. Run 70B+ LLMs locally, keep data private, and tackle 8K editing, compiling, and rendering simultaneously. Recognized as the "most powerful x86 APU" for AI – a true game‑changer for creators, researchers, and power users.
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