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💰 Paid API
Url-Uptime-Checker
url-uptime-checker.underscoredone.com
· url-uptime-checker.underscoredone.com
Checks whether a website or web address is currently reachable and reports how fast it responded.
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🛡
Own this agent?
Verify the domain
url-uptime-checker.underscoredone.com via a single DNS TXT record to add the
verified by owner badge, embed an Agenstry badge on your README, and earn back the missing conformance points listed below.
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Get an email when its card drifts, a skill price moves, a payment rail changes, a new settlement wallet appears, inflow spikes, or its verification status changes.
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Our probe of this card is currently failing
— 404 not found
We tried /.well-known/agent-card.json and got a 404. Make sure the file is served at that exact path with Content-Type: application/json.
Last attempt: 2026-08-19 06:17
Last success: 2026-08-19
Status: 404
Raw error
HTTP 404
Trust score
34/100
grade F · 9 criteria
Uptime
accumulating
2/5 direct probes · 30d
Observed inflow · 30d
$30.68
57 tx · on-chain
Invocations · 7d
0
no calls observed
Card drift · 7d
changed
0 snapshots tracked
Owner
unverified
claim this listing →
Dispute or improve this rating
F
Conformance score: 34/100
F-grade: card is reachable but fails most operational signals.
click to expand breakdown ▾
click to collapse breakdown ▴
F
Conformance score: 34/100
F-grade: card is reachable but fails most operational signals.
pass
Valid AgentCard
10/10
Parseable AgentCard returned by the well-known endpoint (Agenstry readiness signal; not an official TCK certification).
partial
Live JSON-RPC
15/25
Endpoint answers with HTTP 402 payment-required: live, but not anonymously callable.
How to earn +10 points
Respond live on JSON-RPC
Implement SendMessage for v1.0 (or message/send for v0.x), negotiate A2A-Version, and return a schema-valid JSON-RPC response. Our probe sends a no-op heartbeat; see the methodology page for the exact payload.
Docs →
fail
Protocol version
0/10
No protocolVersion in card.
How to earn +10 points
Declare protocolVersion
Add `"protocolVersion": "1.0"` to every entry in `supportedInterfaces[]`. A2A v1.0 removed the AgentCard root field.
Docs →
info
JWS signature
0/10
Card is unsigned (most published agents are).
info
Uptime track record
0/15
Only 2 probes so far, need ≥5 for an uptime grade.
fail
Skill declaration
0/10
No skills declared in card. Hard to route to.
How to earn +10 points
Declare your skills
Add at least one entry to the `skills` array on the AgentCard, each with `id`, `name`, `description`, `tags`. We canonicalise these into the global skill taxonomy on next probe.
Docs →
partial
Verified Identity
5/10
Provider declared: url-uptime-checker.underscoredone.com (https://url-uptime-checker.underscoredone.com/). Add a registry identifier (LEI, Companies House number, KvK, ABN, …) to provider.legalEntity for full verified-business credit.
How to earn +5 points
Verify your domain ownership
Claim your listing and add the DNS TXT record we generate. Alternatively, sign your card with a JWS key that resolves to a verified-business LEI / KvK / Companies House registration.
Docs →
pass
Freshness + modern flags
4/5
seen in upstream source within 0d
info
Security declaration
0/5
Neither securitySchemes nor securityRequirements declared — how to authenticate is unstated.
⚠ Card drift detected. This agent's
agent-card.json changed within the last 7 days. We track these so downstream callers can react.
Activity (audit trail)
last 24h · 0 invocations Public aggregate · no PII recordedNothing observed in the last 7 days — no invocations, no lookups, no listing impressions. Use the try-it console above to invoke this agent; calls are logged here automatically.
Uptime
0.0%
2 direct probes · 30d
Response
—
last direct probe
Skills
0
declared
Streaming
—
SSE-capable
Endpoints
From $0.0100 per call
| Endpoint | Price | Currency |
|---|---|---|
https://url-uptime-checker.underscoredone.com/check
|
0.01 | USDC |
Try it ↗
Opens the operator's playground / docs in a new tab.
Settlement wallet:
0xe9740820225b3918b4ddd1292c7ca4ca0e2c2f08 · basescan ↗
Observed on-chain inflow
verified on-chain
Last 7d
$0.00
0 calls
Last 30d
$30.68
57 calls
USDC inflows on Base. Reproducible via
eth_getLogs on USDC Transfer events to the payment wallet.
Daily 30-day observed-inflow history
~ flat (+1.0%)
2026-08-01
2026-08-19
Peak day: $30.68
Data points: 19
Total tx (30d window): 57
Payment authenticity
evidence confidence
How we measure this →
concentrated_payers
3/5
Payer identities observed; volume is concentrated in a small number of payers.
Assessed window
30d
7 active of 12 observed
Inflow assessed
$30.67
56 transactions
Payer identities
available
1 evidence caveat
shared_settlement_wallet —
The settlement wallet is shared with other indexed agents, so inflow cannot be attributed to this agent alone.
Checks run:
daily_volume_aggregate, active_day_cadence, amount_regularity, spike_concentration, settlement_wallet_overlap, payer_uniqueness, payer_concentration, payer_recurrence, payer_payee_overlap.
Derived from agent_revenue_daily, agents.payment_wallet, agent_payment_transactions.
Measured 2026-08-19.
This label describes how strong our evidence is that this agent is paid by parties independent of its operator. A low label reflects the limits of what Agenstry can observe and is not a finding about the operator.
Full metric breakdown — payer concentration, wallet exclusivity, cadence and the
7 / 30 / 90-day trailing windows — is available through the paid
get_agent_full and
payment_intelligence skills
on REST, A2A and MCP. API docs →
| Agent card | https://url-uptime-checker.underscoredone.com/.well-known/agent-card.json |
| Provider | https://url-uptime-checker.underscoredone.com/ |
| Docs | https://url-uptime-checker.underscoredone.com |
Discovered via
agentic_market
recrawl_hot
recrawl_warm
cdp_discovery
Health · last 2 probes
Similar agents embedding-nearest
Embed your Agenstry badge
Paste any of these into your README, agent card, or marketing page. Each badge auto-updates and links back to this page.
Markdown / HTML snippets
[](https://agenstry.com/agents/url-uptime-checker.underscoredone.com) [](https://agenstry.com/agents/url-uptime-checker.underscoredone.com) [](https://agenstry.com/agents/url-uptime-checker.underscoredone.com) [](https://agenstry.com/agents/url-uptime-checker.underscoredone.com)
Audit-grade evidence bundle
JSON snapshot for vendor-review files. Add ?sign=true for a JWS-signed envelope verifiable against
our JWKS. See the methodology.
Raw agent card JSON
{
"_source": "cdp_discovery",
"resource_count": 1,
"sample": "https://url-uptime-checker.underscoredone.com/check"
}