Pulsefeed X402 is answering right now. Last checked moments ago. 103 installs a week from npm. It exposes 11 tools. Last commit 2 Nov 2026.
Verify x402 payment endpoints before an AI agent pays: scam scan, on-chain checks, trust scores.
Installs per day
peak 170 · avg 18 · -66% w/w
a month agotoday
Uptime history
91 days of history · worst day 56%
91 days agonow
100.0%
Uptime 24h
92 of 92 checks
11
Tools
read from the server
139 ms
Response time
average over 24h
103
Installs / week
npm and PyPI
What changed 8
Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 9 August 2026. No other catalogue keeps this.
2 Oct
a tool description was rewritten
pulsefeed_products
21 Sep
3 tools changed the parameters they ask for
mcp_drift_check, x402_changes, x402_incidents
2 Sep
a tool description was rewritten
pulsefeed_products
25 Aug
a tool changed version
9 Aug
a tool appeared
mcp_drift_check
9 Aug
a tool changed version
Nothing serious here today
Today is the operative word: we check Pulsefeed X402 every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.
Connect this server
Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 0 min ago.
run in your terminal
claude mcp add pulsefeed-x402 --transport http https://pulsefeed.dev/mcp-serverSettings → Connectors → Add custom connector, then paste this address
https://pulsefeed.dev/mcp-server~/.codex/config.toml
[mcp_servers.pulsefeed-x402]
url = "https://pulsefeed.dev/mcp-server".cursor/mcp.json
{
"mcpServers": {
"pulsefeed-x402": {
"url": "https://pulsefeed.dev/mcp-server"
}
}
}.vscode/mcp.json
{
"servers": {
"pulsefeed-x402": {
"type": "http",
"url": "https://pulsefeed.dev/mcp-server"
}
}
}Available tools 11
Read directly from the server with tools/list, grouped by what they act on.
If a tool disappears, we record the date.
x402
check_x402_endpoint
Before paying an unknown x402 endpoint, check whether it is safe: liveness, trust score (0-100), anomaly flags (receiver address changed between observations, catalog price vs. challenge price, invalid receiver, testnet listed as production, scheme outside the x402 spec), receiver stability and observation-count-qualified uptime — with a pay/avoid verdict. Reads the challenge from both the response body and the v2 PAYMENT-REQUIRED header. Free.
x402_changes
What changed in the x402 ecosystem recently: services that stopped returning a valid challenge, receiver (payTo) changes, price changes, recoveries, newly-seen services. Derived from compounding time-series that cannot be reconstructed after the fact. Free.
x402_data_sample
FREE sample of the PulseFeed Data API: top-10 live x402 services as FULL records (compounding payTo/price history, anomaly flags, on-chain receiver profile), top-10 MCP servers with full audit profile, and 3 live incidents.
x402_ecosystem_stats
Live health of the whole x402 agent-payment ecosystem: tracked/alive/dead counts, catalog-accuracy audit (what share of listings called 'healthy' actually work), risk-level distribution, receiver stability and on-chain receiver profiles. Free.
x402_incidents
Anomalies observed in live x402 endpoints by continuous independent measurement: receiver-address changes between observations, catalog price vs. challenge price mismatches, invalid receivers, testnet endpoints listed as production, payment schemes outside the x402 spec — EACH WITH AN ON-CHAIN REFERENCE on Base. Measurements, not accusations of intent. Check before paying anything. Free.
x402_leaderboard
Top x402 services ranked by the open PulseFeed Trust Score (0-100), with price and network — the most reliable live agent-payment endpoints right now. Free.
x402_working_services
List x402 agent-payment services that are currently ALIVE and return a valid x402 challenge, ranked by PulseFeed Trust Score, plus ecosystem risk map. Use this to pick a service with a track record instead of paying an endpoint you have not checked. Free.
mcp
mcp_check_server
Before installing an MCP server or npm package, audit it: does it run an INSTALL SCRIPT (arbitrary code execution at `npm i`), is it abandoned, does it ship a repository and license, weekly downloads, provenance — with a safe/caution/avoid verdict. ~11% of audited MCP servers run install scripts. Free.
mcp_drift_check
The rug pull check. `mcp_check_server` answers whether a package is safe TODAY; this answers what CHANGED after it was adopted: an install script added in a later version (arbitrary code on `npm i` that was not there at review time), package ownership swapped, repository removed, package unpublished, build provenance lost. Pass your own dependency list to check it in one call. Derived from a daily external re-audit of the whole MCP package population — an event exists only because a snapshot from before it exists. Free.
mcp_security_report
State of MCP Security: how many audited MCP servers run an arbitrary install script, are abandoned, ship no repository or license — with day-over-day deltas and a sample of currently-flagged servers. From a daily audit of the MCP server catalog. Free.
pulsefeed
pulsefeed_products
List PulseFeed's paid products and how to pay via x402 (USDC on Base): deep trust check, endpoint track record, bulk trust dataset, full MCP drift series, the cross-domain Data API and on-chain token signals. Includes the client-side spend-cap gotcha for x402-fetch.
Endpoints
| URL | Transport | State | Latency | Checked |
|---|---|---|---|---|
| https://pulsefeed.dev/mcp-server | streamable-http | answering | 155 ms | 0 min ago |
Alternatives to Pulsefeed X402
same job, measured the same wayAttest
by attestagents
Scan agent payment endpoints (x402, AP2, L402, MPP, 402) for a trust grade A-F before paying.
P
PickleCheck
by picklecheck
Scam, x402 endpoint and payment checks for AI trading agents on Base. Free calls daily, then x402.
A
Aval
by hstgr-srv1024618-aval
Payment-backed trust scores for AI agents on Base (ERC-8004). $0.01 per check via x402.
AgentIndex
by cognivis
Trust scores and on-chain payment receipts for x402 services.
Hosannaith MCP
by cameron4316
Check x402 endpoint reliability on Algorand before an agent routes a payment there.
x402 Merchant Check
by gradientdecisions
Pre-payment merchant trust checks for x402 agents on Base and Solana.
4
402
by 402
Trust layer for agent payments (x402, Base): verify agents, risk scores, signed escrow verdicts.
PayCheck
by toolweather
Score merchant domain, https URL, or 0x wallet trust before an agent pays. Does not send payments.
Pulsefeed X402 — questions
Answers built from our own checks of this server.
What can Pulsefeed X402 do?
It exposes 11 tools, read directly from the server on our last check. Among them: check_x402_endpoint, mcp_check_server, mcp_drift_check, mcp_security_report, pulsefeed_products, x402_changes and 5 more. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README.
How MCP servers expose tools in the first place →
What is Pulsefeed X402 mostly used for?
Its tools cluster around x402 and mcp. That is what this server is built to work with — the grouping comes from the actual tool names, not from a category we assigned.
Is Pulsefeed X402 working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 92 of 92 checks got a reply (100.0%), average response time 139 ms. The bar chart above shows every period we have measured.
How do I connect Pulsefeed X402?
Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.
Does Pulsefeed X402 need an API key?
No. Pulsefeed X402 completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 11 of them are readable on this page. This is what we observed, not what the docs claim.
How fast is Pulsefeed X402?
It answers our handshake in 139 ms on average, which is faster than 85% of all working MCP servers we measure. That puts it in the quick quarter of the ecosystem. The comparison comes from our own checks across the whole registry, every 15 minutes.
How many people use Pulsefeed X402?
The npm package pulsefeed-x402-mcp was installed 103 times in the last week. Week over week that is -66%. We show installs rather than GitHub stars on purpose: a star is a bookmark, an install is someone actually running it.
Is Pulsefeed X402 open source?
The code is open source: it is published under the MIT licence, written in JavaScript, 0 stars on GitHub and 15 open issues. The licence covers the code in the repository, not the hosted service at pulsefeed.dev, which runs on its operator's own terms.