Who it is for
Founders and finance staff at companies that already bank with Mercury.
Mercury
Read-only access to Mercury banking account data
Overview
What Mercury does
Mercury connects a business banking account to ChatGPT so its figures can be questioned in plain language. Software spending over a past quarter, or a chart of burn across recent months, comes back from the account itself rather than from an exported spreadsheet or a dashboard view.
Balances, statements, individual transactions, cards, and recipients are all readable, across checking, credit, and treasury accounts.
Setup runs through OAuth in a single step, and the connection is read only by design. Nothing can be paid or moved from the chat: the app answers questions about the account and stops there.
What stands out
The read-only design means account questions get answered with no ability to move money.
Availability
Where Mercury is listed
Mercury ships this on both marketplaces: Mercury is listed in the Claude connectors directory and in the ChatGPT apps directory, under the same publisher domain.
Only 392 of the 3,150 products in this directory are listed in both marketplaces. One MCP server can serve both surfaces; what differs is each platform's listing and review process.
ChatGPT listing
In the ChatGPT apps directory
- Developer
- Mercury Technologies inc
- Filed under
- Finance
- Listed since
- June 2026
- Authentication
- Authenticates when installed
- Website
- mercury.com
- Policies published
- Privacy policy · Terms of service
- Official listing
- Open in ChatGPT
- Snapshot
- August 2026
Claude listing
In the Claude connectors directory
Mercury publishes 5 tools to Claude, a deliberately narrow surface; only 22.3% of the 1,253 Claude-listed connectors expose fewer.
The median Claude-listed connector filed under Finance publishes 12, so this one sits 7 tools below its bucket's median, 133rd of 159.
It falls in the 4-6 tools band, which holds 16.2% of the Claude directory.
Mercury publishes a remote MCP endpoint. Claude connects to it over HTTP; there is nothing to install locally.
Every connector in the Claude directory is remote, all 1,253 of them, so transport is not a differentiator there.
- Publisher
- Mercury
- Verification
- Verified partner (37.8% of the Claude directory)
- Filed under
- Financial Services
- Endpoint
-
https://mcp.mercury.com/mcp - Documentation
- Publisher setup docs
- Published tools
- 5 · 4-6 tools band
- Depth rank in Finance
- 133 of 159
- Snapshot
- August 2026
Mercury carries partner verification in the Claude directory, which 474 of 1,253 listings do (37.8%). That is a review step past self-publishing, not an Anthropic-built server.
In the publisher's words
How Mercury describes it
Check your balance, download statements, search/analyze/graph transactions, and understand Cards directly from Claude. Mercury brings your finances into your AI tools
Quoted from the connector's own Claude directory listing as captured in August 2026. Node8 did not write it and does not vouch for it.
Nearby
Other Finance connectors
Pemo
Read-only queries over Pemo cards, spend and reimbursements
Claude
Campfire
Campfire ERP records queried and exported from a conversation
Claude
Digits
Read-only feed of Digits accounting data
Claude · ChatGPT
MYOB
Read-only view of MYOB Business numbers, currently in beta
Claude
Per Diem
Read-only queries over Per Diem financial data
ChatGPT
Ramp
Spend analysis and card admin through conversation
Claude · ChatGPT
This is an independent catalogue entry compiled by Node8 from Mercury's public marketplace listings as they stood in August 2026. Listing facts come from the marketplaces; the comparisons against the rest of the directory and any live-endpoint measurements are Node8's. Node8 is not affiliated with Mercury, and inclusion here is not an endorsement.
Want your company reachable inside ChatGPT and Claude?
Node8 builds MCP servers end to end: deciding which tools are worth exposing, the authentication and permission model, the review submissions, and the onboarding that gets them used. One server serves ChatGPT, Claude, and Microsoft Copilot.