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dev.coinop/longwatch

REMOTE · LONGWATCH.DEV · SCANNED SEP 20

You are ephemeral; this remembers. Persist watch_id+key; poll later for what you missed.

Available components

0 this week 73 Trust /100
Trust breakdown (7 categories)

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 Security57
Transport & Reachability100
Schema Quality & AI Usability60
  • AI-judged instruction clarity (good).Pass
  • Context-footprint check failed: tool/resource definitions use about 3244 tokens (~180/item across 18 items; 18 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 Management100
  • No destabilizing schema changes in the last 30 days.Pass
Tool Coverage85
  • 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
  • 56% of tool parameters carry a description.Partial
Tool Safety75
  • No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
  • 0 of 2 tool(s) whose name or description implies an irreversible operation declare an MCP destructiveHint annotation; "check_x402_endpoint" implies "send" and declares no destructiveHint at all, which the MCP spec reads as destructive by default. See how to fix → Fail
  • An AI judge read all 18 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
Install

How do I install the dev.coinop/longwatch MCP server?

dev.coinop/longwatch is a hosted endpoint at https://longwatch.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 · longwatch.dev

# add to Claude Code
claude mcp add --transport http dev-coinop-longwatch 'https://longwatch.dev/mcp'
// .cursor/mcp.json
{
  "mcpServers": {
    "dev-coinop-longwatch": {
      "url": "https://longwatch.dev/mcp"
    }
  }
}
// .vscode/mcp.json
{
  "servers": {
    "dev-coinop-longwatch": {
      "type": "http",
      "url": "https://longwatch.dev/mcp"
    }
  }
}
# ~/.codex/config.toml
[mcp_servers.dev-coinop-longwatch]
url = "https://longwatch.dev/mcp"
// opencode.json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "dev-coinop-longwatch": {
      "type": "remote",
      "url": "https://longwatch.dev/mcp",
      "enabled": true
    }
  }
}
# add to OpenClaw
openclaw mcp add dev-coinop-longwatch --url 'https://longwatch.dev/mcp' --transport streamable-http
# ~/.hermes/config.yaml
mcp_servers:
  dev-coinop-longwatch:
    url: "https://longwatch.dev/mcp"
// ~/.netclaw/config/netclaw.json
{
  "McpServers": {
    "dev-coinop-longwatch": {
      "Transport": "http",
      "Url": "https://longwatch.dev/mcp"
    }
  }
}
# add to Vellum
assistant mcp add dev-coinop-longwatch -t streamable-http -u 'https://longwatch.dev/mcp'
// mcp.json
{
  "mcpServers": {
    "dev-coinop-longwatch": {
      "type": "http",
      "url": "https://longwatch.dev/mcp"
    }
  }
}

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

Changelog

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.

  • 2 Sept 26 +1
    • Stability: 0.97 → pass security
  • 30 Aug 26 +1

    No change was recorded against any check on this day. Stability & Change Management went from 87 to 90. That category is still filling its 30-day observation window: 26 days of observed history at the previous scan, 27 at this one. The score rises as the window fills, whether or not the server changes.

  • 29 Aug 26 0
    • Tool “check_x402_endpoint” rewrote its description, which is the text the model reads security
    • Tool “poll_trial” rewrote its description, which is the text the model reads security
    • Tool “watch_x402_endpoint” rewrote its description, which is the text the model reads security
  • 27 Aug 26 −1
    • Tool “check_now” rewrote its description, which is the text the model reads security
    • Tool “create_watch” rewrote its description, which is the text the model reads security
    • Tool “poll_alerts” rewrote its description, which is the text the model reads security
    • Tool “try_watch” rewrote its description, which is the text the model reads security
    • Tool coverage: 100% → 56% functional
    • Schema quality: 206 → 179 functional
    • Schema quality: excellent → good functional
    • New tool “check_crypto_price” functional
    • New tool “check_insider_trades” functional
    • New tool “check_rss_feed” functional
    • New tool “check_sec_filings” functional
    • New tool “check_web_page” functional
    • New tool “check_x402_endpoint” functional
    • New tool “watch_crypto_price” functional
    • New tool “watch_insider_trades” functional
    • New tool “watch_rss_feed” functional
    • New tool “watch_sec_filings” functional
    • New tool “watch_web_page” functional
    • New tool “watch_x402_endpoint” functional
    • “check_now” added an optional parameter “body” cosmetic
    • “check_now” added an optional parameter “expected_amount_atomic” cosmetic
    • “check_now” added an optional parameter “expected_network” cosmetic
    • “check_now” added an optional parameter “expected_scheme” cosmetic
    • “check_now” added an optional parameter “method” cosmetic
    • “create_watch” added an optional parameter “body” cosmetic
    • “create_watch” added an optional parameter “expected_amount_atomic” cosmetic
    • “create_watch” added an optional parameter “expected_network” cosmetic
    • “create_watch” added an optional parameter “expected_scheme” cosmetic
    • “create_watch” added an optional parameter “method” cosmetic
    • “try_watch” added an optional parameter “body” cosmetic
    • “try_watch” added an optional parameter “expected_amount_atomic” cosmetic
    • “try_watch” added an optional parameter “expected_network” cosmetic
    • “try_watch” added an optional parameter “expected_scheme” cosmetic
    • “try_watch” added an optional parameter “method” cosmetic
    • “check_now” reworded the description of “url” cosmetic
    • “create_watch” reworded the description of “url” cosmetic
    • “try_watch” reworded the description of “url” cosmetic
  • 26 Aug 26 0
    • We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
  • 25 Aug 26 0
    • “create_watch” added an optional parameter “idempotency_key” cosmetic

    1 cosmetic change on this day. Switch on “Show cosmetic changes” to see it.

  • 24 Aug 26 +1

    No change was recorded against any check on this day. Stability & Change Management went from 67 to 70. That category is still filling its 30-day observation window: 20 days of observed history at the previous scan, 21 at this one. The score rises as the window fills, whether or not the server changes.

  • 22 Aug 26 71
    • Tool “check_now” rewrote its description, which is the text the model reads security
    • Tool “create_watch” rewrote its description, which is the text the model reads security
    • Tool “poll_alerts” rewrote its description, which is the text the model reads security
    • Schema quality: good → excellent functional
Diagnostics

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 20 Sept 2026 · Probed https://longwatch.dev/mcp

TLS valid

Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .

Subject Issuer Valid from Valid until Key Signature Serial
CN=longwatch.dev CN=YE1,O=Let's Encrypt,C=US 2 Aug 2026 31 Oct 2026 ECDSA 256 ECDSA-SHA384 63ae053e88c188869cfb270e9304932079f
SANs: longwatch.dev
CN=YE1,O=Let's Encrypt,C=US (CA) CN=Root YE,O=ISRG,C=US 3 Sept 2025 2 Sept 2028 ECDSA 384 ECDSA-SHA384 5ddd70dd31f801c85c186a7a04b80afe
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 longwatch.dev. Not signed

Zone DS Keys Algorithms Outcome
. trust_anchor 20326, 38696 8, 8 Verified
dev. present 60074 8 Verified
longwatch.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://longwatch.dev/mcp Verified 200
http (plaintext) http://longwatch.dev/mcp HTTPS enforced 308 https://longwatch.dev/mcp
MCP tools · 18 exposed · ~3,244 tokens

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 →

Tool Tokens
check_crypto_price ~146

Check a CoinGecko asset price and whether it currently meets a USD threshold or 24-hour move condition. Costs $0.001 USDC per call via x402 (Base) — no API key, no account. Calling without payment returns 402 with the payment requirements. Free alternative: GET https://longwatch.dev/demo for a free NVDA Form 4 sample, or POST https://longwatch.dev/try for a 24h watch — no wallet needed.

NameTypeReqDescription
abovenumber
belownumber
coinstringyesCoinGecko id, e.g. bitcoin
move_pct_24hnumber

No output schema declared.

No examples provided.

check_insider_trades ~135

Get recent Form 4 insider transactions for a ticker or CIK, parsed into buyer/seller, shares, value, transaction type, and 10b5-1 status. Costs $0.001 USDC per call via x402 (Base) — no API key, no account. Calling without payment returns 402 with the payment requirements. Free alternative: GET https://longwatch.dev/demo for a free NVDA Form 4 sample, or POST https://longwatch.dev/try for a 24h watch — no wallet needed.

NameTypeReqDescription
ciknumber
tickerstring

No output schema declared.

No examples provided.

check_now ~368

This-session snapshot only — no watch, no cursor. Use when you will not come back. Required by type: url/rss/x402 need url; price needs coin plus above, below, or move_pct_24h; edgar needs ticker or cik. 8-K items are decoded, Form 4 trades parsed, and x402 probes validate the unpaid 402 challenge without sending payment. If the job spans runs, create_watch instead and persist watch_id + key. Costs $0.001 USDC per call via x402 (Base) — no API key, no account. Calling without payment returns 402 with the payment requirements. Free alternative: GET https://longwatch.dev/demo for a free NVDA Form 4 sample, or POST https://longwatch.dev/try for a 24h watch — no wallet needed.

NameTypeReqDescription
abovenumberprice: threshold to compare against
belownumberprice: threshold to compare against
bodyobject
ciknumberedgar: SEC CIK, as an alternative to ticker
coinstringprice: CoinGecko id, e.g. 'bitcoin'
expected_amount_atomicstring|number
expected_networkstring
expected_schemestring
formsarrayedgar: form filter, e.g. ["8-K","4"]
methodstring
move_pct_24hnumberprice: 24h move threshold to compare against
tickerstringedgar: stock ticker, e.g. 'NVDA'
typestringyessource type
urlstringurl|rss|x402: public URL

No output schema declared.

No examples provided.

check_rss_feed ~117

Read the latest items from a public RSS or Atom feed now. Use for a one-session lookup. Costs $0.001 USDC per call via x402 (Base) — no API key, no account. Calling without payment returns 402 with the payment requirements. Free alternative: GET https://longwatch.dev/demo for a free NVDA Form 4 sample, or POST https://longwatch.dev/try for a 24h watch — no wallet needed.

NameTypeReqDescription
urlstringyespublic RSS or Atom feed URL

No output schema declared.

No examples provided.

check_sec_filings ~130

Get recent SEC filings for a ticker or CIK now, with decoded 8-K items and parsed Form 4 transactions. Costs $0.001 USDC per call via x402 (Base) — no API key, no account. Calling without payment returns 402 with the payment requirements. Free alternative: GET https://longwatch.dev/demo for a free NVDA Form 4 sample, or POST https://longwatch.dev/try for a 24h watch — no wallet needed.

NameTypeReqDescription
ciknumber
formsarray
tickerstring

No output schema declared.

No examples provided.

check_web_page ~115

Fetch a public web page now and return normalized text metadata. Use for a one-session lookup. Costs $0.001 USDC per call via x402 (Base) — no API key, no account. Calling without payment returns 402 with the payment requirements. Free alternative: GET https://longwatch.dev/demo for a free NVDA Form 4 sample, or POST https://longwatch.dev/try for a 24h watch — no wallet needed.

NameTypeReqDescription
urlstringyespublic http(s) page URL

No output schema declared.

No examples provided.

check_x402_endpoint ~164

Send an unpaid request and validate the endpoint's HTTP 402 challenge, accepted networks, scheme, amount, and recipient. The target probe does not attach payment. Costs $0.001 USDC per call via x402 (Base) — no API key, no account. Calling without payment returns 402 with the payment requirements. Free alternative: GET https://longwatch.dev/demo for a free NVDA Form 4 sample, or POST https://longwatch.dev/try for a 24h watch — no wallet needed.

NameTypeReqDescription
bodyobject
expected_amount_atomicstring|number
expected_networkstring
expected_schemestring
methodstring
urlstringyes

No output schema declared.

No examples provided.

create_watch ~403

Keep watching a source between agent runs and alert when it changes. Persist watch_id and key; later poll_alerts with since=<last cursor> returns only what you missed. Required by type: url/rss/x402 need url; price needs coin plus a threshold; edgar needs ticker or cik. Create includes the baseline and 7 days of polling. Costs $0.005 USDC per call via x402 (Base) — no API key, no account. Calling without payment returns 402 with the payment requirements. Free alternative: GET https://longwatch.dev/demo for a free NVDA Form 4 sample, or POST https://longwatch.dev/try for a 24h watch — no wallet needed.

NameTypeReqDescription
abovenumberprice: alert when USD price crosses above this
belownumberprice: alert when USD price crosses below this
bodyobject
ciknumberedgar: SEC CIK, as an alternative to ticker
coinstringprice: CoinGecko id, e.g. 'bitcoin'
expected_amount_atomicstring|number
expected_networkstring
expected_schemestring
formsarrayedgar: form filter, e.g. ["8-K","4"]
idempotency_keystringunique retry key; the same key and input return the original watch without charging twice
methodstring
move_pct_24hnumberprice: alert when |24h change| exceeds this percent
tickerstringedgar: stock ticker, e.g. 'NVDA'
typestringyeswatch type
urlstringurl|rss|x402: public URL to watch
webhookobjectoptional: POST alerts to this URL as they occur (signed); polling still works

No output schema declared.

No examples provided.

delete_watch ~46

Stop and delete a watch. Free. Free — no payment required.

NameTypeReqDescription
keystringyeskey returned by create_watch
watch_idstringyeswatch_id to delete

No output schema declared.

No examples provided.

poll_alerts ~151

What is new since your last run. Pass since={last seq you saw}; the response carries a new cursor. New paid watches include 7 days of polling. After that window, one $0.005 paid poll renews the next 7 days. Polling keeps the watch alive; beta watches remain free. Free through the watch's included polling window; after that, one $0.005 USDC x402 payment renews 7 days. No API key or account.

NameTypeReqDescription
keystringyeskey returned by create_watch
sincenumberhighest alert seq already seen; 0 on first poll
watch_idstringyeswatch_id returned by create_watch

No output schema declared.

No examples provided.

poll_trial ~110

Poll a trial watch created by try_watch. Free. Pass since={last seq you saw}; the response carries a new cursor. Once the trial expires, create a paid watch with create_watch; paid creation includes 7 days of polling and can be renewed. Free — no payment required.

NameTypeReqDescription
keystringyeskey returned by try_watch
sincenumberhighest alert seq already seen; 0 on first poll
watch_idstringyeswatch_id returned by try_watch

No output schema declared.

No examples provided.

try_watch ~283

Create a free trial watch — no payment, no wallet, no account. Same watch types as create_watch (url, rss, price, edgar, x402). The trial runs for 24h, one at a time per caller, and cannot use webhooks. Use this first to see what the alerts look like before paying. Free — no payment required.

NameTypeReqDescription
abovenumberprice: alert when USD price crosses above this
belownumberprice: alert when USD price crosses below this
bodyobject
ciknumberedgar: SEC CIK, as an alternative to ticker
coinstringprice: CoinGecko id, e.g. 'bitcoin'
expected_amount_atomicstring|number
expected_networkstring
expected_schemestring
formsarrayedgar: form filter, e.g. ["8-K","4"]
methodstring
move_pct_24hnumberprice: alert when |24h change| exceeds this percent
tickerstringedgar: stock ticker, e.g. 'NVDA'
typestringyeswatch type
urlstringurl|rss|x402: public URL to watch

No output schema declared.

No examples provided.

watch_crypto_price ~196

Monitor a crypto price between agent runs and alert once when it crosses a threshold, with hysteresis before re-arming. Includes 7 days of polling. Costs $0.005 USDC per call via x402 (Base) — no API key, no account. Calling without payment returns 402 with the payment requirements. Free alternative: GET https://longwatch.dev/demo for a free NVDA Form 4 sample, or POST https://longwatch.dev/try for a 24h watch — no wallet needed.

NameTypeReqDescription
abovenumber
belownumber
coinstringyesCoinGecko id, e.g. bitcoin
idempotency_keystringunique retry key; the same key and input return the original watch
move_pct_24hnumber
webhookobjectoptional HTTPS endpoint for signed push alerts; polling still works

No output schema declared.

No examples provided.

watch_insider_trades ~169

Monitor a company between agent runs for new Form 4 insider buys, sells, grants, and tax withholding. Includes 7 days of polling. Costs $0.005 USDC per call via x402 (Base) — no API key, no account. Calling without payment returns 402 with the payment requirements. Free alternative: GET https://longwatch.dev/demo for a free NVDA Form 4 sample, or POST https://longwatch.dev/try for a 24h watch — no wallet needed.

NameTypeReqDescription
ciknumber
idempotency_keystringunique retry key; the same key and input return the original watch
tickerstring
webhookobjectoptional HTTPS endpoint for signed push alerts; polling still works

No output schema declared.

No examples provided.

watch_rss_feed ~161

Monitor an RSS or Atom feed between agent runs and alert once per new item. Includes 7 days of polling. Costs $0.005 USDC per call via x402 (Base) — no API key, no account. Calling without payment returns 402 with the payment requirements. Free alternative: GET https://longwatch.dev/demo for a free NVDA Form 4 sample, or POST https://longwatch.dev/try for a 24h watch — no wallet needed.

NameTypeReqDescription
idempotency_keystringunique retry key; the same key and input return the original watch
urlstringyespublic RSS or Atom feed URL
webhookobjectoptional HTTPS endpoint for signed push alerts; polling still works

No output schema declared.

No examples provided.

watch_sec_filings ~177

Monitor a company between agent runs for new SEC filings, decoded 8-K events, and parsed Form 4 trades. Includes 7 days of polling. Costs $0.005 USDC per call via x402 (Base) — no API key, no account. Calling without payment returns 402 with the payment requirements. Free alternative: GET https://longwatch.dev/demo for a free NVDA Form 4 sample, or POST https://longwatch.dev/try for a 24h watch — no wallet needed.

NameTypeReqDescription
ciknumber
formsarray
idempotency_keystringunique retry key; the same key and input return the original watch
tickerstring
webhookobjectoptional HTTPS endpoint for signed push alerts; polling still works

No output schema declared.

No examples provided.

watch_web_page ~163

Monitor a public web page between agent runs and alert with added and removed text when it changes. Includes 7 days of polling. Costs $0.005 USDC per call via x402 (Base) — no API key, no account. Calling without payment returns 402 with the payment requirements. Free alternative: GET https://longwatch.dev/demo for a free NVDA Form 4 sample, or POST https://longwatch.dev/try for a 24h watch — no wallet needed.

NameTypeReqDescription
idempotency_keystringunique retry key; the same key and input return the original watch
urlstringyespublic http(s) page URL
webhookobjectoptional HTTPS endpoint for signed push alerts; polling still works

No output schema declared.

No examples provided.

watch_x402_endpoint ~210

Monitor an x402 endpoint for downtime and changes to its payment challenge, price, network, scheme, or recipient. Target probes do not attach payment. Includes 7 days of polling. Costs $0.005 USDC per call via x402 (Base) — no API key, no account. Calling without payment returns 402 with the payment requirements. Free alternative: GET https://longwatch.dev/demo for a free NVDA Form 4 sample, or POST https://longwatch.dev/try for a 24h watch — no wallet needed.

NameTypeReqDescription
bodyobject
expected_amount_atomicstring|number
expected_networkstring
expected_schemestring
idempotency_keystringunique retry key; the same key and input return the original watch
methodstring
urlstringyes
webhookobjectoptional HTTPS endpoint for signed push alerts; polling still works

No output schema declared.

No examples provided.

Common questions

What is the dev.coinop/longwatch MCP server?

dev.coinop/longwatch is an MCP server listed in the public MCP registry as dev.coinop/longwatch. You are ephemeral; this remembers. Persist watch_id+key; poll later for what you missed. This page covers its hosted endpoint (https://longwatch.dev/mcp).

Is the dev.coinop/longwatch MCP server safe to use?

dev.coinop/longwatch scores 73 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 dev.coinop/longwatch MCP server expose?

dev.coinop/longwatch exposes 18 tools: check_now, create_watch, check_web_page, watch_web_page, check_rss_feed, and 13 more. Their descriptions and schemas cost roughly 3,244 tokens of context every time the server is loaded.

Does the dev.coinop/longwatch MCP server require authentication?

No. We connected to dev.coinop/longwatch without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.

Is the dev.coinop/longwatch MCP server still maintained?

dev.coinop/longwatch is still listed as active in the MCP registry. We last reached this channel on 20 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.