Roundhouse

Sirenic

L

TradingLiveeip155:8453Exactvia cdp
https://api.sirenic.eu/v1/eu/entreprise/PL/:nip/marches-publics
PolandPolish-companyPublic-procurementBzpE-zamowienia
Calls · 30d
6
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 6 snapshots so far.
$121.42
Verified settled volume
1,908 settlements proven x402 by their on-chain EIP-3009 marker.
$0.020
Listed price
As published in the catalog. Always read the live 402 before paying.
6
Calls · 30d
Upstream's own call count for this endpoint, not ours.
1
Unique payers · 30d
Last called 2026-09-18 13:47Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x76A672EEe56D29D475b0715cc03B8C99D70EC8A2

The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.

Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Provider

The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.

Live 402 challenge

Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.

{
  "error": "payment_required",
  "price": "$0.02",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0x76A672EEe56D29D475b0715cc03B8C99D70EC8A2",
      "amount": "20000",
      "scheme": "exact",
      "network": "eip155:8453",
      "mimeType": "application/json",
      "resource": "https://api.sirenic.eu/v1/eu/entreprise/PL/{nip}/marches-publics",
      "description": "Public-procurement record of a Polish company from the Biuletyn Zamówień Publicznych (e-Zamówienia public API, UZP, CC0; national below-EU-threshold notices since 2021): contracts WON matched by legal-person NIP — buyer (name, NIP), subject, CPV, part, outcome, tenders received, awarded price and contract value in PLN, contract date, enterprise size — and notices ISSUED as a buyer; newest first, capped at 100. Winners served only when proven legal persons (legal form or KRS); sole traders never.",
      "maxAmountRequired": "20000",
      "maxTimeoutSeconds": 120
    },
    {
      "asset": "0x60a3E35Cc302bFA44Cb288Bc5a4F316Fdb1adb42",
      "extra": {
        "name": "EURC",
        "version": "2"
      },
      "payTo": "0x76A672EEe56D29D475b0715cc03B8C99D70EC8A2",
      "amount": "20000",
      "scheme": "exact",
      "network": "eip155:8453",
      "mimeType": "application/json",
      "resource": "https://api.sirenic.eu/v1/eu/entreprise/PL/{nip}/marches-publics",
      "description": "Public-procurement record of a Polish company from the Biuletyn Zamówień Publicznych (e-Zamówienia public API, UZP, CC0; national below-EU-threshold notices since 2021): contracts WON matched by legal-person NIP — buyer (name, NIP), subject, CPV, part, outcome, tenders received, awarded price and contract value in PLN, contract date, enterprise size — and notices ISSUED as a buyer; newest first, capped at 100. Winners served only when proven legal persons (legal form or KRS); sole traders never.",
      "maxAmountRequired": "20000",
      "maxTimeoutSeconds": 120
    }
  ],
  "message": "Paid endpoint. Retry with an x402 payment header. Price: $0.02 in USDC (or the same numeric amount in EURC) on Base (mainnet). Paying in EURC requires an explicit client opt-in since @x402/core 2.23 (spendControls.allowedAssets), otherwise your client silently keeps the USDC option. Set allowedAssets[].maxAmountPerPayment as well (integer ATOMIC amount, e.g. \"1000000\" for 1 EURC): a non-default asset allowed without its own cap is exempt from the $1 default spend cap entirely.",
  "preview": "https://api.sirenic.eu/preview/entreprise/55203253400646",
  "x402Version": 2,
  "documentation": "https://api.sirenic.eu/llms.txt"
}

Accepts

The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.

0.02USDC≈ $0.02 USD
on Base · exact scheme

Pay 0.02 USDC on Base to 0x76A6…EC8A2. The signed payment is good for 2 minutes.

Paid to
0x76A6…EC8A2
USD Coin contract
0x8335…02913
Payment window
2 minutes
As published
20000 smallest units
20000units
on Base · exact scheme

That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.

Paid to
0x76A6…EC8A2
Token contract
0x60a3…adb42
Payment window
2 minutes
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x76A672EEe56D29D475b0715cc03B8C99D70EC8A2",
    "amount": "20000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 120
  },
  {
    "asset": "0x60a3E35Cc302bFA44Cb288Bc5a4F316Fdb1adb42",
    "extra": {
      "name": "EURC",
      "version": "2"
    },
    "payTo": "0x76A672EEe56D29D475b0715cc03B8C99D70EC8A2",
    "amount": "20000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 120
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET",
        "pathParams": {
          "nip": "6040248554"
        },
        "queryParams": {}
      },
      "output": {
        "type": "json",
        "example": {
          "nip": "6040248554",
          "pays": "PL",
          "stock": {
            "depuis": "2021-01-01",
            "gagnants_a_classer": 1832,
            "dernier_jour_complet": "2026-09-17"
          },
          "avis_emis": [],
          "nature_nip": "personne_morale",
          "attributions": [
            {
              "cpv": [
                "45400000-1"
              ],
              "duree": "126 dni",
              "issue": "contrat conclu",
              "objet": "Wykonanie remontu dla części: Część I: Malowanie - I/Tczew; Część II: Remont pokoi biurowych - I/Gdynia; Część III: Remont pokoi biurowych - I/Kartuzy; Część IV: Remont pokoi biurowych - I/Malbork",
              "partie": 4,
              "avis_id": "2026/BZP 00441969/01",
              "gagnant": {
                "nip": "6040248554",
                "pays": "PL",
                "ville": "Pszczółki",
                "taille": "micro-entreprise",
                "province": "PL22",
                "nom_publie": "M&M JOB CONNECT Sp. z o.o.",
                "taille_source": "Mikro przedsiębiorca"
              },
              "acheteur": {
                "nip": "5832622111",
                "nom": "ZAKŁAD UBEZPIECZEŃ SPOŁECZNYCH ODDZIAŁ W GDAŃSKU",
                "pays": "PL",
                "ville": "Gdańsk",
                "province": "PL22"
              },
              "publie_le": "2026-09-17T05:36:05Z",
              "type_avis": "TenderResultNotice",
              "groupement": false,
              "offres_pme": 2,
              "type_marche": "travaux",
              "date_contrat": "2026-09-01",
              "issue_source": "zawarcieUmowy",
              "offres_recues": 2,
              "sous_seuil_ue": true,
              "nombre_parties": 4,
              "prix_retenu_pln": 581992.37,
              "type_marche_source": "Works",
              "valeur_contrat_pln": 581992.37
            }
          ],
          "nombre_avis_emis": 0,
          "tronque_avis_emis": false,
          "valeur_totale_pln": 581992.37,
          "aucune_attribution": false,
          "nombre_attributions": 1,
          "tronque_attributions": false
        }
      }
    },
    "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"
              ],
              "type": "string"
            },
            "pathParams": {
              "type": "object",
              "required": [
                "nip"
              ],
              "properties": {
                "nip": {
                  "type": "string",
                  "description": "Polish NIP, ten digits (separators tolerated), e.g. 6040248554"
                }
              }
            },
            "queryParams": {
              "type": "object",
              "properties": {}
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object"
            }
          }
        }
      }
    },
    "routeTemplate": "/v1/eu/entreprise/PL/:nip/marches-publics"
  }
}

Provenance

Seen in the source catalog
2026-09-18 13:46Z
Last indexed by Roundhouse
2026-09-24 07:20Z
Last enriched (probe, favicon, geo)
2026-09-18 14:15Z
x402 version
2
Max timeout
120s
Liveness probe
HTTP 402
Report

Hand this page to an agent

Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.

GET api.roundhouseai.io/v0/endpoints

This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 6 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.

Open skill.md
Show the prompt
Using Roundhouse, look up the x402 service Sirenic and tell me whether it is
worth paying: what a call costs, whether the endpoint answered when last probed, and what
its payment record actually shows.

curl -s 'https://api.roundhouseai.io/v0/endpoints?q=Sirenic'
curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>'

Then call it: read the price from the live 402 at https://api.sirenic.eu/v1/eu/entreprise/PL/:nip/marches-publics, never from
a cached figure, and pay with an x402 client.

The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except
/v0/unified* and /v0/endpoints. Mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402,
or use an organization key from https://roundhouseai.io/dashboard/team.

If you do not have Roundhouse tools or skills installed, read
https://roundhouseai.io/skill.md first — it is the whole procedure.