x402 Web Tools
REMOTE · X402-WEB-TOOLS.MICROTOOLS-X402.WORKERS.DEV
Web/PDF to Markdown, transcription, paper search and citation checks. Pay per call in USDC via x402.
Available components
Last scanned (2 hours ago)
Scores higher than 46% of remote servers
Reachable. Last reached 23 Oct 2026.
Category Education and Research
How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. How we score → Why this is hard to score →
Endpoint Security46
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- Authorisation not fully verified: no authorisation is required to call this server, and 9 tool(s) never declared a destructiveHint. The MCP spec treats an absent hint as destructive by default, so we cannot call this surface safe. See how to fix → View diagnostics → Unverified
- HTTPS enforcement could not be verified: the plaintext port answered with HTTP 406, which proves neither a plaintext path nor enforcement. View diagnostics → Unverified
- HSTS check failed: the Strict-Transport-Security header is absent. See how to fix → View diagnostics → Fail
- DNSSEC check failed: this domain isn't protected by DNSSEC. See how to fix → View diagnostics → Fail
Transport & Reachability100
- Verified streamable-http transport via a live MCP handshake. View diagnostics → Pass
Schema Quality & AI Usability74
- AI-judged instruction clarity (excellent).Pass
- Context-footprint check failed: tool/resource definitions use about 1227 tokens (~136/item across 9 items; 9 tools + 0 resources), over budget; trim descriptions and params. See how to fix → Fail
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management10
- Stability observed for 3 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage100
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 100% of tool parameters carry a description.Pass
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 9 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 9 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 22 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 3 to 7. That category is still filling its 30-day observation window: 1 days of observed history at the previous scan, 2 at this one. The score rises as the window fills, whether or not the server changes.
- 21 Oct 26 0
- Stability: unverified → 0.03 ▲ functional
- 20 Oct 26 60
First indexed and scored.
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 23 Oct 2026 · Probed https://x402-web-tools.microtools-x402.workers.dev/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=microtools-x402.workers.dev | CN=YE2,O=Let's Encrypt,C=US | 17 Oct 2026 | 15 Jan 2027 | ECDSA 256 | ECDSA-SHA384 | 5569066fc774feb8fcf1b2d80c0e89b0357 |
| SANs: *.microtools-x402.workers.dev, microtools-x402.workers.dev | ||||||
| CN=YE2,O=Let's Encrypt,C=US (CA) | CN=Root YE,O=ISRG,C=US | 3 Sept 2025 | 2 Sept 2028 | ECDSA 384 | ECDSA-SHA384 | 4df3b15dd6c0784c507cd37b58e6f115 |
| CN=Root YE,O=ISRG,C=US (CA) | CN=ISRG Root X2,O=Internet Security Research Group,C=US | 13 May 2026 | 2 Sept 2032 | ECDSA 384 | ECDSA-SHA384 | 872165fc34b6e5fba8add5b3705fb53a |
| CN=ISRG Root X2,O=Internet Security Research Group,C=US (CA) | CN=ISRG Root X1,O=Internet Security Research Group,C=US | 13 May 2026 | 2 Sept 2032 | ECDSA 384 | SHA256-RSA | 6c8f1dc727c7117f7baf853ac980f9cd |
Background: What to check on a remote MCP endpoint →
DNSSEC insecure
Validation of x402-web-tools.microtools-x402.workers.dev. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| dev. | present | 60074 | 8 | Verified |
| workers.dev. | absent | Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation |
Authentication No authorisation required
The endpoint answered without asking for a token. Anyone who knows the URL can reach it.
| Result | No authorisation required |
|---|---|
| HTTP status | 200 |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://x402-web-tools.microtools-x402.workers.dev/mcp | Verified | 200 | |
| http (plaintext) | http://x402-web-tools.microtools-x402.workers.dev/mcp | Inconclusive | 406 |
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
check_citation ~227
Check whether a cited paper really exists (catch hallucinated or mistyped references) and whether it has been retracted. Give a doi, or a title with optional year and first_author. Returns exists, verdict (verified | found | doi_exists_metadata_mismatch | uncertain | not_found), confidence (high/medium/low) with a note on what matched, is_retracted (OpenAlex is_retracted + Crossref/Retraction Watch notices) and the best match. Data: OpenAlex (CC0, openalex.org) with Crossref REST (crossref.org) for retraction notices and as fallback. Upstream errors are not charged. Costs $0.002 USDC per check via x402.
| Name | Type | Req | Description |
|---|---|---|---|
| doi | string | – | DOI of the cited work (preferred if known) |
| first_author | string | – | First author's name or surname as cited (optional) |
| title | string | – | Title of the cited work (used when no DOI is given; also cross-checked against a DOI) |
| year | integer | – | Publication year as cited (optional) |
No output schema declared.
No examples provided.
get_paper ~169
Look up one scholarly work by DOI (10.xxxx/..., doi.org URL), arXiv id (arXiv:1706.03762) or OpenAlex work id (W...). Returns title, authors, year, venue, DOI, citation count, references count, open-access PDF link, abstract, OpenAlex id and a retraction flag (OpenAlex is_retracted plus Crossref/Retraction Watch notices). Data: OpenAlex (CC0, openalex.org) with Crossref REST (crossref.org) for retraction notices and as fallback. Not-found and upstream errors are not charged. Costs $0.002 USDC per lookup via x402.
| Name | Type | Req | Description |
|---|---|---|---|
| id | string | yes | DOI, doi.org URL, arXiv:id or OpenAlex work id |
No output schema declared.
No examples provided.
health ~30
Free health check. Returns service status, version, tool prices, network and the plain-HTTP x402 endpoints.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
ping ~46
Paid connectivity test: returns ok and a server timestamp. Use it to check that your x402 payment flow works end to end. Costs $0.001 USDC per call via x402.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
read_pdf ~87
Fetch a public PDF (max 10 MB) and convert it to Markdown with Cloudflare Workers AI toMarkdown. Returns title (if detected), url, markdown, word_count. Same URL safety rules as read_url. Failed conversions are not charged. Costs $0.006 USDC per call via x402.
| Name | Type | Req | Description |
|---|---|---|---|
| url | string | yes | Public http(s) URL of a PDF file |
No output schema declared.
No examples provided.
read_url ~128
Fetch a public web page and return its main content as clean Markdown (readability extraction): title, url, final_url, markdown, word_count. HTML, plain text, Markdown, JSON and XML. Static fetch only (no JavaScript rendering). Respects robots.txt, blocks private/loopback/metadata hosts, max 3 MB / 15 s, no logins or paywall bypass. For PDFs use read_pdf. Failed reads are not charged. Costs $0.002 USDC per call via x402.
| Name | Type | Req | Description |
|---|---|---|---|
| url | string | yes | Public http(s) URL to read |
No output schema declared.
No examples provided.
read_url_safe ~117
Same as read_url plus a heuristic prompt-injection check: flags hidden/invisible text, instruction-like phrases ("ignore previous instructions", role reassignment, secret exfiltration, chat-template tokens), suspicious HTML comments and zero-width/Unicode-tag characters. Returns injection_check {flagged, risk none|low|medium|high, signals}. Heuristic, not a guarantee. Failed reads are not charged. Costs $0.003 USDC per call via x402.
| Name | Type | Req | Description |
|---|---|---|---|
| url | string | yes | Public http(s) URL to read |
No output schema declared.
No examples provided.
search_papers ~215
Search scholarly papers (OpenAlex index of 250M+ works). Returns up to 25 results with title, authors, year, venue, DOI, citation count, open-access PDF link, abstract (reconstructed from OpenAlex's inverted index; may be null when the publisher withholds it) and OpenAlex id. Optional from_year / to_year / open_access_only filters. Data: OpenAlex (CC0, openalex.org) with Crossref REST (crossref.org) for retraction notices and as fallback. Upstream errors are not charged. Costs $0.005 USDC per search via x402.
| Name | Type | Req | Description |
|---|---|---|---|
| from_year | integer | – | Earliest publication year (inclusive) |
| limit | integer | – | Number of results, 1-25 (default 10) |
| open_access_only | boolean | – | Only open-access works (default false) |
| query | string | yes | Search terms (title, abstract and full-text relevance search) |
| to_year | integer | – | Latest publication year (inclusive) |
No output schema declared.
No examples provided.
transcribe_audio ~208
Transcribe a public direct audio file URL (mp3, wav, m4a, ogg/opus, flac; max 25 MB and 10 minutes, checked from the file header before transcription) with Whisper (@cf/openai/whisper-large-v3-turbo) on Cloudflare Workers AI. Returns text, language, duration, segments with timestamps, optional SRT/VTT subtitles. YouTube/TikTok/Instagram and other page URLs are rejected. Failed transcriptions and files with no detected speech are not charged. Costs $0.01 USDC per file via x402.
| Name | Type | Req | Description |
|---|---|---|---|
| include_words | boolean | – | Include word-level timestamps in segments (default false) |
| language | string | – | Optional ISO language hint, e.g. en, ur, es (auto-detected if omitted) |
| subtitles | string | – | Also return SRT and/or WebVTT subtitles (default none) |
| url | string | yes | Direct public URL of an audio file |
No output schema declared.
No examples provided.
How do I install the x402 Web Tools MCP server?
x402 Web Tools is a hosted endpoint at https://x402-web-tools.microtools-x402.workers.dev/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
remote · x402-web-tools.microtools-x402.workers.dev
claude mcp add --transport http dev-workers-microtools-x402-x402-web-tools-web-t 'https://x402-web-tools.microtools-x402.workers.dev/mcp'
What is the x402 Web Tools MCP server?
x402 Web Tools is an MCP server listed in the public MCP registry as dev.workers.microtools-x402.x402-web-tools/web-tools. Web/PDF to Markdown, transcription, paper search and citation checks. Pay per call in USDC via x402. This page covers its hosted endpoint (https://x402-web-tools.microtools-x402.workers.dev/mcp).
Is the x402 Web Tools MCP server safe to use?
x402 Web Tools scores 61 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.
What tools does the x402 Web Tools MCP server expose?
x402 Web Tools exposes 9 tools: read_url, read_url_safe, read_pdf, transcribe_audio, search_papers, and 4 more. Their descriptions and schemas cost roughly 1,227 tokens of context every time the server is loaded.
Does the x402 Web Tools MCP server require authentication?
No. We connected to x402 Web Tools without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.
Is the x402 Web Tools MCP server still maintained?
x402 Web Tools is still listed as active in the MCP registry. We last reached this channel on 23 October 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.