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BaseSentinel

payment-ready 2026-08-09, probe currently failing

Base threat-intel API for AI agents (M2M). HTTP 402 + USDC on Base. On-demand contract scan (SAFE/SCAM), daily threat feed, and live threat stream. Settlement via X-Payment-Proof (USDC tx hash).

Pay from $0.005 to $0.01 per request in USDC on Base, settled onchain via the x402 protocol, no signup, no API key needed.

listed 2026-08-03 · no on-chain settlement recorded yet

BASE URL https://api.blackswanlabs.pl │ WEBSITE https://blackswanlabs.pl │ ENDPOINTS 3 │ NETWORK Base │ ASSET USDC │ MEMBER SINCE 2026-08-03 │ MONITORED SINCE 2026-08-03

VERDICT

ranking generation 3

Not ranked yet: this listing was not in the ranked pool for Blockchain the last time we built it, which happens at most once a minute. A service listed moments ago enters at the next rebuild.

ALTERNATIVES IN BLOCKCHAIN

Other Blockchain services in this directory, ordered by the same measured score. The figures are ours: 30-day uptime from our own probes, 30-day settlement volume read on-chain (a conservative undercount, and null where we cannot measure it, never a zero).

Ranked alternative x402 services in the same category, with band, measured score, 30-day uptime and 30-day on-chain settlement volume
SERVICE	BAND	SCORE	UPTIME 30D	VOL 30D
Loyal Spark	strong	97	100%	$134.84
OneSource	strong	95	100%	$88.05
true402	solid	90	99.5%	$0.70
GPUOps Blockchain Data MCP	solid	89	100%	$0
SolSigs	solid	89	100%	$0

5 of 42 other ranked services in Blockchain · see the whole category

ASSESSMENT

updated 10m ago

The parts the verdict above is computed from, each with its proof. Click any chip. Measured values stay read-only; unknown is honest, and an unknown is never counted as a zero.

reliability 0%

uptime 24h: 0%
uptime 7d: 0%
uptime 30d: 0%
uptime 90d: 75.7%
response p95: -
avg response: -
total checks: 121

Measured on the unpaid 402 handshake, not the paid call. A service can 402 correctly and still fail after payment.

compliance A (14/14), stale (probe failing)

14 of 14 x402 conformance checks pass. Full checklist below.

jump to compliance checklist

price $0.005 to $0.01 (p42 in Blockchain)

price (min): $0.005
price (max): $0.01
category percentile (min): p42 in Blockchain
category percentile (max): p31 in Blockchain
endpoints / prices: 3 / 2
model: tiered
stability: 100%

risk clean

No deterministic risk flag. Risk fires only on an exact blocklist match, or a reserved-brand name with a mismatched verified payTo. Never from low uptime, a high price, or a model guess.

domain age: 48d
registrar: cyber_Folks S.A.
hosting: custom
domain created: 2026-07-28

Identity facts, not a risk score.

traction $0.00 30d · 0 buyers

volume 30d: $0.00
buyers 30d: 0
settlements 30d: 0
measured since: --- (start of our harvest window)
last settlement: ---
top buyer share: -
trend 7d vs 30d: -
networks: eip155:8453
volume all-time: $0
settlements all-time: 0
median settlement 30d: -
max settlement 30d: -
settled via: -

Conservative undercount: only USDC settlements via facilitators we measure are counted. A measured floor, not an estimate.

Top buyer share is a concentration signal, not part of the ranking score.

WHAT IT DOES

ai-derived

No AI synthesis has been produced for this service yet.

ENDPOINTS

Service endpoints with HTTP method, path, description, pricing, and network
METHOD	PATH	PRICE	NETWORK	ASSET	402 CHANNEL
GET	/api/feed/daily/2026-07-30	$0.01	Base	USDC	header
GET	/scan/0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913	$0.005	Base	USDC	header
GET	/stream/threats	$0.005	Base	USDC	header

3 endpoints

REQUEST / RESPONSE EXAMPLE

An unpaid request to GET /api/feed/daily/2026-07-30 returns HTTP 402 with the payment terms. Settle onchain via your facilitator, then retry with the X-Payment header.

// request

curl -i 'https://api.blackswanlabs.pl/api/feed/daily/2026-07-30'

// 402 response (captured by monitor) · 3 payloads · click to expand

[
  {
    "error": "X-Payment-Proof (USDC Transfer tx hash) is required. Coinbase facilitator / EIP-3009 PAYMENT-SIGNATURE payloads are not accepted.",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USDC",
          "version": "2"
        },
        "payTo": "0x21360A04853b85a8d2E918b73f97C8ccf5939946",
        "amount": "5000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://api.blackswanlabs.pl/scan/0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "mimeType": "application/json",
      "description": "On-demand Base contract scan (bytecode + GoPlus + honeypot.is) with CLEAR/CAUTION/AVOID verdict"
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "type": "http",
            "method": "GET",
            "headers": {
              "X-Payment-Proof": "<base_usdc_tx_hash>"
            }
          },
          "output": {
            "type": "json",
            "example": {
              "status": "SAFE",
              "reasons": [
                "None"
              ],
              "verdict": "CLEAR",
              "riskScore": 12,
              "risk_flags": [],
              "verdict_score": 88,
              "creator_attribution": null
            }
          }
        },
        "schema": {
          "type": "object",
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "required": [
            "input"
          ],
          "properties": {
            "input": {
              "type": "object",
              "required": [
                "type",
                "method"
              ],
              "properties": {
                "type": {
                  "type": "string",
                  "const": "http"
                },
                "method": {
                  "enum": [
                    "GET",
                    "HEAD",
                    "DELETE"
                  ],
                  "type": "string"
                },
                "headers": {
                  "type": "object",
                  "additionalProperties": {
                    "type": "string"
                  }
                },
                "queryParams": {
                  "type": "object",
                  "additionalProperties": {
                    "type": "string"
                  }
                }
              },
              "additionalProperties": false
            },
            "output": {
              "type": "object",
              "required": [
                "type"
              ],
              "properties": {
                "type": {
                  "type": "string"
                },
                "example": {
                  "type": "object"
                }
              }
            }
          }
        }
      },
      "baseSentinel": {
        "note": "Pay with an on-chain USDC Transfer to payTo, then send that tx hash in X-Payment-Proof. Do not use Coinbase facilitator settlement.",
        "binding": "one_tx_hash_per_contract",
        "product": "scan",
        "settlement": "tx_hash_proof",
        "facilitator": false,
        "proofHeader": "X-Payment-Proof",
        "humanNetwork": "base"
      }
    },
    "x402Version": 2
  },
  {
    "error": "X-Payment-Proof (USDC Transfer tx hash) is required. Coinbase facilitator / EIP-3009 PAYMENT-SIGNATURE payloads are not accepted.",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USDC",
          "version": "2"
        },
        "payTo": "0x21360A04853b85a8d2E918b73f97C8ccf5939946",
        "amount": "10000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://api.blackswanlabs.pl/api/feed/daily/2026-07-30",
      "mimeType": "application/json",
      "description": "Daily Base threat pack (SCAM + SUSPICIOUS) from watched DEX/launcher coverage"
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "type": "http",
            "method": "GET",
            "headers": {
              "X-Payment-Proof": "<base_usdc_tx_hash>"
            }
          },
          "output": {
            "type": "json",
            "example": {
              "status": "SAFE",
              "reasons": [
                "None"
              ],
              "verdict": "CLEAR",
              "riskScore": 12,
              "risk_flags": [],
              "verdict_score": 88,
              "creator_attribution": null
            }
          }
        },
        "schema": {
          "type": "object",
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "required": [
            "input"
          ],
          "properties": {
            "input": {
              "type": "object",
              "required": [
                "type",
                "method"
              ],
              "properties": {
                "type": {
                  "type": "string",
                  "const": "http"
                },
                "method": {
                  "enum": [
                    "GET",
                    "HEAD",
                    "DELETE"
                  ],
                  "type": "string"
                },
                "headers": {
                  "type": "object",
                  "additionalProperties": {
                    "type": "string"
                  }
                },
                "queryParams": {
                  "type": "object",
                  "additionalProperties": {
                    "type": "string"
                  }
                }
              },
              "additionalProperties": false
            },
            "output": {
              "type": "object",
              "required": [
                "type"
              ],
              "properties": {
                "type": {
                  "type": "string"
                },
                "example": {
                  "type": "object"
                }
              }
            }
          }
        }
      },
      "baseSentinel": {
        "note": "Pay with an on-chain USDC Transfer to payTo, then send that tx hash in X-Payment-Proof. Do not use Coinbase facilitator settlement.",
        "binding": "one_tx_hash_per_feed_date",
        "product": "daily_feed",
        "settlement": "tx_hash_proof",
        "facilitator": false,
        "proofHeader": "X-Payment-Proof",
        "humanNetwork": "base"
      }
    },
    "x402Version": 2
  },
  {
    "error": "X-Payment-Proof (USDC Transfer tx hash) is required. Coinbase facilitator / EIP-3009 PAYMENT-SIGNATURE payloads are not accepted.",
    "accepts": [
      {
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USDC",
          "version": "2"
        },
        "payTo": "0x21360A04853b85a8d2E918b73f97C8ccf5939946",
        "amount": "5000",
        "scheme": "exact",
        "network": "eip155:8453",
        "maxTimeoutSeconds": 300
      }
    ],
    "resource": {
      "url": "https://api.blackswanlabs.pl/stream/threats",
      "mimeType": "application/json",
      "description": "Live SSE stream of newly flagged Base threats (SCAM/SUSPICIOUS)"
    },
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "type": "http",
            "method": "GET",
            "headers": {
              "X-Payment-Proof": "<base_usdc_tx_hash>"
            }
          },
          "output": {
            "type": "json",
            "example": {
              "status": "SAFE",
              "reasons": [
                "None"
              ],
              "verdict": "CLEAR",
              "riskScore": 12,
              "risk_flags": [],
              "verdict_score": 88,
              "creator_attribution": null
            }
          }
        },
        "schema": {
          "type": "object",
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "required": [
            "input"
          ],
          "properties": {
            "input": {
              "type": "object",
              "required": [
                "type",
                "method"
              ],
              "properties": {
                "type": {
                  "type": "string",
                  "const": "http"
                },
                "method": {
                  "enum": [
                    "GET",
                    "HEAD",
                    "DELETE"
                  ],
                  "type": "string"
                },
                "headers": {
                  "type": "object",
                  "additionalProperties": {
                    "type": "string"
                  }
                },
                "queryParams": {
                  "type": "object",
                  "additionalProperties": {
                    "type": "string"
                  }
                }
              },
              "additionalProperties": false
            },
            "output": {
              "type": "object",
              "required": [
                "type"
              ],
              "properties": {
                "type": {
                  "type": "string"
                },
                "example": {
                  "type": "object"
                }
              }
            }
          }
        }
      },
      "baseSentinel": {
        "note": "Pay with an on-chain USDC Transfer to payTo, then send that tx hash in X-Payment-Proof. Do not use Coinbase facilitator settlement.",
        "binding": "one_tx_hash_per_stream_day",
        "product": "live_stream",
        "settlement": "tx_hash_proof",
        "facilitator": false,
        "proofHeader": "X-Payment-Proof",
        "humanNetwork": "base"
      }
    },
    "x402Version": 2
  }
]

OVER TIME

All charts use the 7d selector; each series spans only the dates it has data for. Every series is also served as JSON at /api/v1/services/basesentinel/price, /scores, /volume and /buyers. On-chain volume and distinct buyers are measured over the service's settlement address and are a conservative undercount (only settlements that reach a measured facilitator are counted). The on-chain series roll up hourly, so the latest day can be up to about an hour behind; distinct buyers are counted per payout address, so a service that settles to more than one address is an upper bound.

UPTIME

7d UPTIME 0%

RESPONSE TIME

AVG RESP ---

PRICE (captured 402, USD)

Median across 3 endpoints. Use the selector to isolate one.

SUB-SCORES (uptime + x402 compliance)

checklist grew 11->14 on 2026-07-28; a step here is a metric change, not a regression

PILLARS OVER TIME (measured)

price percentile in Blockchain

site signals present (of 6)

Measured site and economics pillars from the assessment history, so the latest value shown elsewhere on this page reads as a point on a trend rather than a permanent state.

VOLUME (on-chain settlement, USD)

DISTINCT BUYERS

COMPLIANCE

14/14 checks pass · grade A · stale (probe failing)

last 402 captured 2026-08-03 · last up 2026-08-09

402 payload captured
accepts[] array present
payTo address recoverable
payTo at accepts[0].payTo (conformant shape)
payTo is a valid on-chain address
atomic price declared
atomic price in a sane range
asset (token) address declared
network resolves to CAIP-2
payment scheme declared
served over HTTPS
declares the current x402 version (2)
EIP-712 domain parameters present on every EVM entry
x402 v2 envelope delivered in the payment-required header

SITE PILLARS

homepage reachable
openapi doc
pricing page
llms.txt
robots.txt
terms page

recent checks (18) live · click to expand

TIME STATUS RESP CAUSE

10:04:10 UTC ○ DOWN 3334ms network: SSRF: resolved to a private address

04:03:10 UTC ○ DOWN 3334ms network: SSRF: resolved to a private address

22:02:10 UTC ○ DOWN 3334ms network: SSRF: resolved to a private address

16:01:10 UTC ○ DOWN 3334ms network: SSRF: resolved to a private address

10:00:10 UTC ○ DOWN 3615ms network: SSRF: resolved to a private address

03:59:10 UTC ○ DOWN 3334ms network: SSRF: resolved to a private address

21:58:10 UTC ○ DOWN 3334ms network: SSRF: resolved to a private address

15:57:10 UTC ○ DOWN 3334ms network: SSRF: resolved to a private address

09:56:10 UTC ○ DOWN 3334ms network: SSRF: resolved to a private address

03:55:10 UTC ○ DOWN 3572ms network: SSRF: resolved to a private address

21:54:10 UTC ○ DOWN 3335ms network: SSRF: resolved to a private address

15:53:10 UTC ○ DOWN 3527ms network: SSRF: resolved to a private address

09:52:10 UTC ○ DOWN 3334ms network: SSRF: resolved to a private address

03:51:10 UTC ○ DOWN 3334ms network: SSRF: resolved to a private address

21:50:10 UTC ○ DOWN 3350ms network: SSRF: resolved to a private address

15:49:10 UTC ○ DOWN 3334ms network: SSRF: resolved to a private address

09:48:10 UTC ○ DOWN 3334ms network: SSRF: resolved to a private address

03:47:10 UTC ○ DOWN 3334ms network: SSRF: resolved to a private address

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RUN THIS SERVICE?

Keep this listing accurate: propose changes to the name, description, website, category or add new endpoints to monitor. Ownership is verified with a domain proof and every change is reviewed manually; measured data stays read-only.

[ update this listing ]

Earn the verified tier: x402list pays a real call to this endpoint and, if it delivers, the service is delivery-verified. The fee covers the cost of the probe, not the badge; there is no refund if the call does not deliver. Agent and API only, no in-browser signing. See /api.

[ verify this service ($0.25) ]

To request delisting, email info@x402-list.com or update your listing at /services/basesentinel/update.