Prexel Markets Free MCP server
xyz.prexel/markets-freeprexel.xyzstreamable-httpv1.1.0Scanned
Bitcoin Synthesis and Daily Brief with dated evidence, source clocks and a minimum 24-hour delay.
2 tools: 1 change things and 1 only read.
- Reads private data · 0
- Reads text others write · 0
- Can send data out · 0
- 1 finding
Tools listed without sign-in. Remote posture
With Anlyon
1 tool here changes things. Govern it.
- Anlyon lists the tools and adopts none.
- Each tool you adopt gets approvals and receipts.
- Your agent never holds the key.
A tool your agent calls directly is not routed through Anlyon and is not governed by it. anlyon.dev only lists and labels, and these labels are the same either way.
What the Prexel Markets Free MCP server can do
The Prexel Markets Free MCP server is published by prexel.xyz, a domain the MCP Registry verified. It has 2 tools. It can create or change data (1 tool: get_synthesis), but cannot delete data. 1 tool only reads.
None of its tools reads private data, brings in text other people write, or sends data out.
The fixed checks matched 1 finding (annotation-conflict). Each one comes with the text it matched.
Its remote endpoint lists its tools without sign-in.
Last scanned Nov 12, 2026, version 1.1.0.
Tools
Grouped by what each tool does, most consequential first. Open one for its reasons and full description; descriptions are the publisher's own words.
2 tools
Changes things 1Claude Code: ask
get_synthesisStart here for a compact overview of one BTC capture.1 finding
Why it is in this group
- The name "get_synthesis" says "get": a word for reading.
- The description's first verb is "start": a word for a change.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Findings
- Warn
The server marks "get_synthesis" read-only (readOnlyHint: true), and its own name, description or input give the class "write".
What this check looks forMatched text
annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}; The name "get_synthesis" says "get": a word for reading.
Description, as the server wrote it Start here for a compact overview of one BTC capture. Set detail to signals and pin cycle_id to page captured operands. Free captures are retained for follow-ups for up to two hours.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
Only reads 1Show 1 read-only tool
get_daily_briefRead the saved BTC Daily Brief and its evidence cutoff.No findings
Why it is in this group
- The name "get_daily_brief" says "get": a word for reading.
Description, as the server wrote it Read the saved BTC Daily Brief and its evidence cutoff. Pin report_id and use JSON pointer paths to inspect the exact edition.
Annotations the server declares
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.
Exfil surface
Which tools read private data, which read text someone else can write, and which can send data out. One of each is a path a prompt injection can use.
No private-data, untrusted-input, outbound path in this server alone: no tool is tagged private-data or untrusted-input or outbound.
- Reads private data0
- Reads files, mail, messages, databases, secrets, calendars or repositories.
- Reads text others write0
- Brings in text someone else can write: web pages, inbound email, messages, issues and comments.
- Can send data out0
- Can carry data to people or systems: it sends, posts or publishes, or takes a recipient, channel or URL.
Other servers in the same agent add their own tools to these paths. Audit your whole setup to see them together.
Remote posture
What anyone on the internet sees at the remote endpoint: an anonymous initialize and tools/list, and the public OAuth metadata.
Looked at Nov 13, 2026, 11:20 UTC, unchanged since Nov 13, 2026. No credentials were sent and no tool was called. What is looked at.
- Reachable
- yes
- HTTP status of an anonymous initialize
- 200
- tools/list served without credentials
- yes
- Tools that change things, listed without credentials
- 1
- Protocol version
- 2025-06-18
- WWW-Authenticate on 401
- not observed
- resource_metadata in WWW-Authenticate
- not observed
- RFC 9728 protected resource metadata
- not observed
- Authorization servers
- not observed
- Legacy HTTP+SSE transport
- no
- Dynamic client registration
- not observed
- Client ID metadata documents
- not observed
- WarnThe whole server
The endpoint served tools/list without credentials, and the list has 1 tool that changes things (1 write). Whether a call also works without credentials was not tested: tools are never called.
What this check looks forMatched text
https://markets.prexel.xyz/mcp/free: tools/list returned 2 tools to an anonymous client, including get_synthesis (write)
Findings
Matches of fixed checks, with the text they matched.
- Warnget_synthesis
The server marks "get_synthesis" read-only (readOnlyHint: true), and its own name, description or input give the class "write".
What this check looks forMatched text
annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}; The name "get_synthesis" says "get": a word for reading.
History
Changes to its tool definitions and to its remote endpoint, newest first.
No change seen yet. Its tools are rescanned every day, and a remote endpoint is looked at once a week.
Install
Pinned to version 1.1.0. Values in angle brackets are yours to fill in.
claude mcp add --transport http markets-free https://markets.prexel.xyz/mcp/freeclaude mcp add --transport http markets-free https://markets.prexel.xyz/mcp/freeRun in a terminal.
Claude Code permissions
Allow the reads, ask before a change or a way out, deny the deletes. Paste into .claude/settings.json.
{
"permissions": {
"allow": [
"mcp__markets-free__get_daily_brief"
],
"ask": [
"mcp__markets-free__get_synthesis"
],
"deny": []
}
}Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. A read that can send data out (it takes a URL, say) asks first too. It assumes the server is installed as markets-free. Review it before you use it.
Pin
Keep the decision: fail CI when the tools change, follow every change, or show a badge.
Pin in CI
Fail a build when the tools you reviewed are not the tools the server serves today.
curl -s "https://anlyon.dev/api/v1/servers/xyz.prexel/markets-free/verify?hash=47557f6c1a15f370fbbc8b538d4acad4c3ae63479bb491c49c8508213bf9c18f" | jq -e '.changed == false'Pinned hash 47557f6c1a15, from Nov 12, 2026, 14:18 UTC.
Watch
Get told when its tools change: a new tool, a new description, a new class.
https://anlyon.dev/servers/xyz.prexel/markets-free/changes.xmlAn Atom feed. Works in any feed reader or Slack's RSS app.
Badge
[](https://anlyon.dev/servers/xyz.prexel/markets-free)Source: MCP Registry. Synced Nov 12, 2026, 14:18 UTC.
Prexel Markets Free MCP server: questions and answers
Answered from the scan above, not from the publisher's description.
Is the Prexel Markets Free MCP server safe?
- No scan can promise that. What its definitions show: 2 tools, 1 of which can change, send or delete something, and 1 finding from fixed checks. Allow the reads, ask before each change, and deny the deletes; the permissions block on this page does that.
Can the Prexel Markets Free MCP server delete data?
- No tool is classed as destructive: going by their definitions, none of them deletes, cancels or revokes anything.
Can the Prexel Markets Free MCP server do things that cannot be undone?
- No tool is classed as irreversible: none of them sends, pays, publishes or merges, going by their definitions.
What tools does the Prexel Markets Free MCP server have?
- 2 tools: 1 write, 1 read. get_synthesis and get_daily_brief.
Does the Prexel Markets Free MCP server need sign-in or OAuth?
- Its remote endpoint listed its tools to an anonymous client, without sign-in.
Does the Prexel Markets Free MCP server send data to outside services?
- None of its tools sends, posts or publishes, or takes a recipient, channel or URL.
Has the Prexel Markets Free MCP server changed its tools?
- Not since anlyon.dev started tracking it. Last scanned Nov 12, 2026.