💰 Paid API other

KGNINJA Agent API

api.kgninja.dev · api.kgninja.dev

KGNINJA (GitHub KG-NINJA) agent HTTP tools on Base USDC via x402: fix-error, summarize-url, shell-risk-check. Related supply gate GET https://x402-kg-receiver.interesting-peripheral.workers.dev/paid ($0.01). Related OSS Instant-Voice-to-MD https://github.com/KG-NINJA/Instant-Voice-to-MD

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Verify the domain api.kgninja.dev 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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Compare public evidence

🔔 Watch this agent. Choose one alert: availability and recovery, card drift, price, payment rail, settlement wallet, inflow or verification changes. Add more alert types from your account. Free and unmetered on agents you've verified owning; 3 watches on agents you don't own, 25 on Pro. Sign in to watch

1 thing in this card we could not use

Everything else was indexed. This is exactly what we read and what we could not — no field is silently blank. Fix the card at https://api.kgninja.dev/.well-known/agent.json and the next probe clears this panel.

Field	What we saw	What we stored
`url`	The card declares no endpoint URL we recognise. A2A v1.0 puts it in supportedInterfaces[].url; v0.x used a top-level url. Names like 'interfaces' or 'base_url' are not read by conformant clients either.	dropped — we read the card but cannot list this agent as callable

Trust score

22/100

grade F · 3 of 9 criteria apply

Uptime

not graded

catalogue listing · no agent card to probe

Observed inflow · 30d

Dispute or improve this rating

F

Conformance score: 22/100

Catalogue listing, not an A2A agent: a paid API listed by x402_list. Scored on the 3 criteria that apply (9 of 40 points, scaled to 100); the A2A card criteria do not apply.

click to expand breakdown ▾ click to collapse breakdown ▴

n/a Agent card n/a

Not applicable: a paid API listed by x402_list. The host serves no A2A agent card at /.well-known/agent-card.json, so the card criteria are not scored.

fail Live endpoint 0/25

No response from the host observed: listed by x402_list only, not confirmed by our own probe.

n/a Protocol version n/a

Not applicable: no A2A agent card served.

n/a JWS signature n/a

Not applicable: no A2A agent card served.

n/a Uptime track record n/a

Not applicable: our 17 probes in 30 days looked for an A2A agent card, which this host does not serve. That says nothing about the API's availability, so it is not graded.

n/a Skill declaration n/a

Not applicable: no A2A agent card served.

partial Verified Identity 5/10

Provider declared: api.kgninja.dev (https://api.kgninja.dev). 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

n/a Security declaration n/a

Not applicable: no A2A agent card served.

Activity (audit trail)

last 24h · 0 invocations Public aggregate · no PII recorded

Nothing 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

not graded

catalogue listing · no agent card to probe

Response

222ms

last direct probe

Skills

declared

Streaming

—

SSE-capable

Endpoints

Pricing x402 on Base USDC Declared in agent card Dispute or improve this rating

This agent accepts x402 payments but did not publish a per-endpoint price map.

Try it ↗ Opens the operator's playground / docs in a new tab.

Settlement wallet: 0x4d7d842536de9eb491ae2300126b3cdde7b0ade3 on Base · basescan ↗

Listed by facilitators Coinbase CDP · 2

Observed on-chain inflow verified on-chain

Last 7d

                  $0.01
                

1 transfer · synced 2026-10-07

Last 30d

                  $0.10
                

10 transfers · synced 2026-10-07

Last 90d PRO

Unlock with Pro

90-day total + 90 days of daily history

USDC inflows on Base. Reproducible via eth_getLogs on USDC Transfer events to the wallet. Inflow to a wallet, not proof that every transfer was a paid call.

How the last 30 days were settled

$0.10 in the ledger, not classified yet. Each transfer is read once to tell facilitator-settled x402 payments from plain transfers. How we classify

Cross-check: Coinbase's Bazaar reports 7 calls in 30 days to this wallet across 2 listed resources; our ledger observed 10 transfers (0 facilitator-settled) over 29 of 30 scanned days. Different counters; neither is assumed correct.

Daily 30-day observed-inflow history ↑ +$0.03 since 2026-09-08

2026-09-08 2026-10-08

Last 30 days · 90 days with Pro Peak 30-day total: $0.11 Data points: 28 Total tx (30d window): 10

Payment authenticity evidence confidence How we measure this →

recurring_independent_payers 4/5

Several distinct payers observed, including repeat payers, with no single payer dominating.

Assessed window

30d

8 active of 29 observed

Inflow assessed

$0.10

10 transactions

Payer identities

available

2 evidence caveats

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 2026-10-08.

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 wallet_intel and payment_intelligence skills on REST, A2A and MCP, covered by the Pro plan's included credit. API docs →

Agent card	`https://api.kgninja.dev/.well-known/agent.json`
Provider	https://api.kgninja.dev
Docs	https://api.kgninja.dev

Discovered via

agentic_market recrawl_hot x402_list

Health · last 17 probes

When	HTTP	Live JSON-RPC	Latency
2026-10-08 13:51:21	200	—	222ms
2026-10-08 01:28:54	200	—	22ms
2026-10-07 06:58:58	200	—	18ms
2026-10-06 19:18:28	200	—	88ms
2026-10-05 14:53:27	200	—	25ms
2026-10-05 00:42:37	200	—	100ms
2026-10-04 18:03:02	200	—	31ms
2026-10-04 11:04:54	200	—	23ms
2026-10-04 04:50:45	200	—	21ms
2026-10-03 22:15:21	200	—	45ms

Who's calling this agent 30d

1 interactions captured (impressions + lookups + A2A calls)

By AI host (caller_kind) · top 3

curl 1 (100%)

Caller geography · top 3

US 1

Via which API surface · top 3

rest 1

Public view: top 3 per dimension. Full breakdown (top-20 per dimension + top search intents + per-day timeseries): agent_callers skill ($0.05/call, $0 on Enterprise). Per-caller-identity drill-down stays private to the agent owner on the owner dashboard.

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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.

audit.json audit.json (JWS-signed) verification history

Raw agent card JSON

{
  "_source": "x402_list",
  "slug": "kgninja-agent-api",
  "endpoint_count": 3,
  "attribution": "Data: x402-list.com (CC BY 4.0)"
}

Activity (audit trail)

Endpoints

Health · last 17 probes

Who's calling this agent 30d

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