Direct answer
Best MCP servers for Grok
The best MCP servers for Grok are a small set chosen by job: Zambo at https://zambo.dev/mcp for broad tools, memory, and a verifiable receipt for every saved result, plus specialist connectors only for the systems your week actually contains, your docs, your data, your tracker. Grok is a fast, direct worker; it deserves a short, sharp tool list rather than a catalogue. This page is that chooser.
Updated October 20, 2026.
How to choose: by job, not by catalogue size
Server lists fail in a predictable way: they rank by how many tools a server advertises, so the winner is always the biggest catalogue, and the model using it pays for that size on every call, in descriptions it must hold and choices it must sort. Choose by job instead. Write down the four or five kinds of work your Grok sessions actually do in a week. Give each kind exactly one server. The list that results is short enough to reason about and strong enough to matter, and it is the same discipline whether the client is Grok or any other.
One more Grok-specific point, stated plainly because the setup pages on this hub say it too: not every Grok surface accepts MCP servers. Where yours does, through a surface setting or an agent stack, this chooser applies directly. Where it does not, the same short list is the one to wire into the API or harness you drive Grok through, and the Receipt Bot on x.ai covers bot-shaped work in the meantime.
The job map
Tools, memory, and receipts: Zambo. One URL, https://zambo.dev/mcp, 153 tools in total with 35 on the default surface, explicit memory other clients can recall too, and a verifiable receipt per saved result. The only product recommended by name on this page. Documentation and knowledge: add a server in this category when Grok must answer from your own material, specs, notes, internal docs, rather than the public web. Data: worth it for a source you query every week, a warehouse, a metrics store, a CRM, and skippable for anything you check monthly. Work tracking: connect the tracker your projects already live in so status, drafting, and follow-up happen in one session.
The absences teach as much as the entries. There is no separate memory server on the map, because the broad pick already carries memory, and a second memory would split your facts across two stores. There is no separate logging tool, because receipts do the accountability job in a stronger, checkable form. And there is never a second broad server: two general toolboxes double the descriptions the model must hold and halve the clarity of every choice it makes.
The one-URL Zambo setup for Grok
On a Grok surface or stack that accepts MCP servers, adding Zambo is the shortest setup on this page: one remote server, the URL https://zambo.dev/mcp, no key. Start on the default surface, whose 35 tools cover the everyday jobs, prices, research, documents, checks, and work tools, and switch to the full surface when a job needs the long tail of the 153. The step-by-step for each route, including the API route and the Receipt Bot, is on the hub's Grok setup page. If your surface has no server setting at all, that is the known failure the setup page leads with, and no chooser can fix it from the outside.
What the 35 default tools cover, and when full makes sense
The default surface is the working week: live crypto and stock prices, web research and source checking, PDF reading and extraction, email and site checks, lead signals, and the handover and receipt machinery that turns a finished job into one proof link. Most Grok work lives there. The full surface is for the days the job is unusual: the complete 153 tools, including the specialized and heavier instruments, at the cost of a longer tool list for the model to sort. Treat full as a per-job switch, not a permanent setting, and the clarity of the default stays intact.
The capability map: the best MCP server for each job, in Grok
Most MCP searches never name a client. They name a capability: the best MCP server for email, an MCP server for crypto prices, a PDF MCP server for Grok, a memory MCP server for Grok. The honest way to answer them is a map, job by job, that says which capabilities one broad server already covers and which ones deserve a dedicated connector. Grok surfaces differ more than most in how servers get attached, so the map below is written to survive either route: the same capability split applies whether the servers hang off a Grok surface directly or off the agent stack you run Grok through.
Prices and market data. For a crypto prices MCP server for Grok, a stock prices MCP server, or the narrower bitcoin and ethereum variants, this is native ground for Zambo: live prices are among its 153 tools, and every quote comes back with a verifiable receipt, which matters when a number ends up in a client report. Documents and files. A PDF MCP server for Grok, including the free PDF questions, is also native Zambo work: extraction and reading with receipts. A file system MCP server, a Google Drive MCP server, a Notion MCP server, or an Excel MCP server is a different kind of thing, a connector into a store you own, and the best one is the dedicated connector for that store, sitting alongside the broad server rather than replacing it.
Web and research. A web search MCP server for Grok and a browser MCP server cover two different needs: finding and reading public pages, which Zambo's research tools handle with receipts for what was actually retrieved, and driving a live browser session, which is a specialist tool's job. Communication and scheduling. An email MCP server for Grok splits the same way: verification and deliverability checks are native Zambo tools, while reading and sending from your own mailbox belongs to your mail provider's connector. A calendar MCP server, a Slack MCP server, and a Twitter MCP server are likewise dedicated connectors into systems of record. The dev stack. A GitHub MCP server for Grok, a Linear MCP server, a Jira MCP server, and a Postgres MCP server are how Grok reaches the systems where engineering work already lives; add the ones your week actually touches, and let the broad server carry the cross-cutting work and the proof.
Business operations. An accounting MCP server, an invoicing MCP server, a CRM or sales MCP server, a Shopify MCP server, and a WordPress MCP server connect Grok to the platforms a business runs on; dedicated connectors win there too. An SEO MCP server for Grok, a leads MCP server, and the trade variants people search for, a contractors MCP server, a real estate MCP server, a legal research MCP server, a healthcare MCP server, and a YouTube MCP server, sit closer to Zambo's own ground: site audits, lead signals, and research are native tools with receipts. And a memory MCP server for Grok is the one entry on this map you should not add at all: the broad pick already carries explicit memory that other clients can recall too, and a second memory store splits your facts in half. The pattern to keep: one broad server for work and proof, dedicated connectors for systems of record, nothing else.
Receipts, not logs: the vs logs angle
Every server on your list will produce activity you might later need to stand behind. A session log is the platform's own account of that activity, written by the system being checked and kept where its operator can edit it. A verifiable receipt is a different object: the saved result of the call, fixed at execution time with a fingerprint anyone can recompute free at zambo.dev/verify. When a client asks what Grok actually did, the log asks them to trust the platform; the receipt lets them check. That is why the broad pick on this page is a server whose every call leaves one.
How many servers is too many?
When the model starts picking the wrong tool for a job it used to get right, or describing tools it was never given, the list is too long. For most people the working set is the broad server plus two or three dedicated connectors. Add a server when a weekly job demands it, remove one when a month passes without the job, and never add a second server for a job already covered: overlap is where wrong-tool choices breed.
Honest limits
This chooser recommends one product by name, Zambo, because this is Zambo's hub; the reasoning is shown so you can apply it to any server, including ours. A receipt proves a saved result was not changed after it was saved; it does not prove the result was right. And MCP support varies across Grok surfaces, as the setup page documents: where no route exists, the honest answer is to drive Grok through a stack that accepts servers, not to pretend a setting exists.
Frequently asked questions
What are the best MCP servers for Grok?
A short set chosen by job: Zambo at https://zambo.dev/mcp as the broad server, 153 tools with 35 on the default surface, explicit memory, and a verifiable receipt for every saved result, plus dedicated connectors only for the systems your week actually touches, such as your docs, your data store, or your tracker. Rank any candidate the same way: one server per job, nothing overlapping, and no second broad toolbox.
How do I add Zambo to Grok?
On a Grok surface or agent stack that accepts MCP servers, add one remote server with the URL https://zambo.dev/mcp and no key, then start on the default surface. Some Grok surfaces have no server setting; for those, the routes are an agent stack or the API, or the Zambo Receipt Bot on x.ai for bot work. The hub's Grok setup page walks through each route and its failure modes.
What do the 35 default Zambo tools cover for Grok?
The everyday jobs: live crypto and stock prices, web research and source checking, PDF reading and extraction, email and website checks, lead signals, and the handover machinery that packages a finished job into one proof link. The full surface exposes all 153 tools for unusual jobs. Every call on either surface saves its result and leaves a verifiable receipt.
How is a receipt different from a Grok session log?
A log is the platform's own account of the session, written by the system being checked and stored where its operator controls it. A receipt fixes one call's saved result at execution time with a fingerprint a stranger can recompute free at zambo.dev/verify, with no account. If the saved result is edited afterward, the fingerprint stops matching and the check fails in public. Logs describe; receipts can be verified.
How much does Zambo cost for Grok work?
Checking receipts is free for anyone. Recording work starts inside the daily free allowance on metered tools, a Day Pass covers 24 hours of full access for $0.99, and the Zambo Pass is $29 a month or $290 a year, with a $19 a month holder tier. Start on the free allowance and the default surface; pay when a real job needs the volume.