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Verify IBAN and bank (SEPA)

verify_iban_bank
Read-only

IBAN verification and bank validation for SEPA: use when you are about to pay a NEW or CHANGED IBAN, or when onboarding a supplier's bank details, and want the cheapest check of the supplier before payment. Runs a FORM check on the IBAN (ISO 13616 structure + mod-97 key), identifies the bank from FREE official registers (France: name+LEI+SIREN via ACPR/REGAFI; Belgium, Austria, Netherlands: name+BIC; Germany when the Bundesbank file is loaded, incl. LEI where available; French banks get their BIC via the GLEIF/SWIFT BIC-to-LEI mapping). Explicitly NOT a payee verification (the account holder's name is never checked and the account's existence is not tested, verification_titulaire: non_disponible): a well-formed IBAN at an identified bank is no proof that the account belongs to your supplier. The answer says this in machine-readable form next to valide: nature_du_controle (forme | forme_et_registres), non_verifie [account existence, holder name] and exemple_de_documentation, true for IBANs on a published list of known documentation samples, which pass every check; the account's existence is not tested; false is not proof of the contrary. The response is Ed25519-signed and carries provenance[]: one entry per block served, naming the official register actually consulted, its licence and its as_of date. For the full invoicing verdict on a French counterparty, call prepare_french_invoice_file instead. Paid via x402 ($0.005 in USDC or EURC). When you report a result, cite its citation verbatim.

Input Schema

NameRequiredDescriptionDefault
ibanYesIBAN of the account to check, any ISO 13616 country (spaces and dashes tolerated); bank identification is limited to the registers listed in the tool description
api_keyNoOptional Sirenic API key (srn_live_…) to pay with prepaid credits instead of x402, with no wallet needed. Get one at https://api.sirenic.eu/compte?utm_source=api&utm_campaign=mcp. Ignored when x_payment is provided (the signed payment wins). On insufficient balance the tool returns a credits error, not an x402 quote.
x_paymentNoOptional signed x402 PAYMENT-SIGNATURE header value. Omit to receive the payment quote.

Output Schema

NameRequiredDescriptionDefault
hintNoHow to settle the quote, present when payment_required is true.
quoteNoThe signable x402 payment requirements when payment_required is true: {x402Version, accepts[]} where each entry carries scheme, network, amount, asset and payTo (USDC and EURC options at the same numeric amount). Sign one entry and call again with `x_payment`.
resultatNoThe endpoint's JSON response when payment_required is false. Paid responses carry `source`, `disclaimer` and an Ed25519 signature, and every paid JSON response carries a `provenance` array (all tools since 2026-09-06): one entry per block served, with the official register, licence, version, `empreinte_sha256` (full snapshots), `as_of` date and `precision_as_of` (what that date means), plus the common per-block envelope: `etat` in a closed list (servi, absence_mesuree, absence_non_conclusive, partiel, perime, indisponible, sans_objet), `motif` when unavailable, `age_jours` (only for publication or ingestion dates), `couverture` (complete / partielle / non_mesurable with its measure) and `confiance` in bands (faible / moyenne / forte, only where a measure grounds it, never averaged across blocks). Read the states before the numbers: an absence_non_conclusive, indisponible or partiel block is never « nothing to report »; only absence_mesuree asserts an absence. Register codes: GET /v1/provenance/registres ; states, closed lists and reading rules: GET /v1/lecture (both free). The PDF tools carry no JSON envelope (the PDF report prints it).
free_tierNoFree API key offer for this tool, present with a quote.
payment_requiredYesTrue when this response is an x402 payment quote instead of data: settle one of the quote's `accepts` options and call the tool again with `x_payment`.

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed1 schema field changed
    • changedOutput schema / properties / resultat / description
      Previous value: -"The endpoint's JSON response when payment_required is false. Paid responses carry `source`, `disclaimer` and an Ed25519 signature, and every paid JSON response carries a `provenance` array (all tools since 2026-09-06) — one entry per block served, with the official register, licence, version, `empreinte_sha256` (full snapshots), `as_of` date and `precision_as_of` (what that date means), plus the common per-block envelope: `etat` in a closed list (servi, absence_mesuree, absence_non_conclusive, partiel, perime, indisponible, sans_objet), `motif` when unavailable, `age_jours` (only for publication or ingestion dates), `couverture` (complete / partielle / non_mesurable with its measure) and `confiance` in bands (faible / moyenne / forte, only where a measure grounds it, never averaged across blocks). Read the states before the numbers: an absence_non_conclusive, indisponible or partiel block is never « nothing to report » — only absence_mesuree asserts an absence. Register codes: GET /v1/provenance/registres ; states, closed lists and reading rules: GET /v1/lecture (both free). The PDF tools carry no JSON envelope (the PDF report prints it)."New value: +"The endpoint's JSON response when payment_required is false. Paid responses carry `source`, `disclaimer` and an Ed25519 signature, and every paid JSON response carries a `provenance` array (all tools since 2026-09-06): one entry per block served, with the official register, licence, version, `empreinte_sha256` (full snapshots), `as_of` date and `precision_as_of` (what that date means), plus the common per-block envelope: `etat` in a closed list (servi, absence_mesuree, absence_non_conclusive, partiel, perime, indisponible, sans_objet), `motif` when unavailable, `age_jours` (only for publication or ingestion dates), `couverture` (complete / partielle / non_mesurable with its measure) and `confiance` in bands (faible / moyenne / forte, only where a measure grounds it, never averaged across blocks). Read the states before the numbers: an absence_non_conclusive, indisponible or partiel block is never « nothing to report »; only absence_mesuree asserts an absence. Register codes: GET /v1/provenance/registres ; states, closed lists and reading rules: GET /v1/lecture (both free). The PDF tools carry no JSON envelope (the PDF report prints it)."
  2. Changed4 schema fields changed
    • removedInput schema / additionalProperties
      Removed value: -false
    • addedOutput schema / properties / free_tier / propertyNames
      Added value: +{
      +  "type": "string"
      +}
    • addedOutput schema / properties / quote / propertyNames
      Added value: +{
      +  "type": "string"
      +}
    • addedOutput schema / properties / resultat / propertyNames
      Added value: +{
      +  "type": "string"
      +}
  3. Changed7 schema fields changed
    • addedInput schema / properties / api_key
      Added value: +{
      +  "description": "Optional Sirenic API key (srn_live_…) to pay with prepaid credits instead of x402, with no wallet needed. Get one at https://api.sirenic.eu/compte?utm_source=api&utm_campaign=mcp. Ignored when x_payment is provided (the signed payment wins). On insufficient balance the tool returns a credits error, not an x402 quote.",
      +  "type": "string"
      +}
    • addedInput schema / properties / x_payment
      Added value: +{
      +  "description": "Optional signed x402 PAYMENT-SIGNATURE header value. Omit to receive the payment quote.",
      +  "type": "string"
      +}
    • addedOutput schema / properties / free_tier
      Added value: +{
      +  "additionalProperties": {},
      +  "description": "Free API key offer for this tool, present with a quote.",
      +  "type": "object"
      +}
    • addedOutput schema / properties / hint
      Added value: +{
      +  "description": "How to settle the quote, present when payment_required is true.",
      +  "type": "string"
      +}
    • changedOutput schema / properties / payment_required / description
      Previous value: -"Always false on this connector: every call is billed to the connected Sirenic account, never paid by the client."New value: +"True when this response is an x402 payment quote instead of data: settle one of the quote's `accepts` options and call the tool again with `x_payment`."
    • addedOutput schema / properties / quote
      Added value: +{
      +  "additionalProperties": {},
      +  "description": "The signable x402 payment requirements when payment_required is true: {x402Version, accepts[]} where each entry carries scheme, network, amount, asset and payTo (USDC and EURC options at the same numeric amount). Sign one entry and call again with `x_payment`.",
      +  "type": "object"
      +}
    • changedOutput schema / properties / resultat / description
      Previous value: -"The endpoint's JSON response when payment_required is false. Paid responses carry `source`, `disclaimer` and an Ed25519 signature, and every paid JSON response carries a `provenance` array (all tools since 2026-09-06), one entry per block served, with the official register, licence, version, `empreinte_sha256` (full snapshots), `as_of` date and `precision_as_of` (what that date means), plus the common per-block envelope: `etat` in a closed list (servi, absence_mesuree, absence_non_conclusive, partiel, perime, indisponible, sans_objet), `motif` when unavailable, `age_jours` (only for publication or ingestion dates), `couverture` (complete / partielle / non_mesurable with its measure) and `confiance` in bands (faible / moyenne / forte, only where a measure grounds it, never averaged across blocks). Read the states before the numbers: an absence_non_conclusive, indisponible or partiel block is never « nothing to report », only absence_mesuree asserts an absence. Register codes: GET /v1/provenance/registres ; states, closed lists and reading rules: GET /v1/lecture (both free)."New value: +"The endpoint's JSON response when payment_required is false. Paid responses carry `source`, `disclaimer` and an Ed25519 signature, and every paid JSON response carries a `provenance` array (all tools since 2026-09-06) — one entry per block served, with the official register, licence, version, `empreinte_sha256` (full snapshots), `as_of` date and `precision_as_of` (what that date means), plus the common per-block envelope: `etat` in a closed list (servi, absence_mesuree, absence_non_conclusive, partiel, perime, indisponible, sans_objet), `motif` when unavailable, `age_jours` (only for publication or ingestion dates), `couverture` (complete / partielle / non_mesurable with its measure) and `confiance` in bands (faible / moyenne / forte, only where a measure grounds it, never averaged across blocks). Read the states before the numbers: an absence_non_conclusive, indisponible or partiel block is never « nothing to report » — only absence_mesuree asserts an absence. Register codes: GET /v1/provenance/registres ; states, closed lists and reading rules: GET /v1/lecture (both free). The PDF tools carry no JSON envelope (the PDF report prints it)."
  4. Changed6 schema fields changed
    • removedInput schema / properties / api_key
      Removed value: -{
      -  "description": "Optional Sirenic API key (srn_live_…) to pay with prepaid credits instead of x402 — no wallet needed. Get one at https://api.sirenic.eu/compte. Ignored when x_payment is provided (the signed payment wins). On insufficient balance the tool returns a credits error, not an x402 quote.",
      -  "type": "string"
      -}
    • removedInput schema / properties / x_payment
      Removed value: -{
      -  "description": "Optional signed x402 PAYMENT-SIGNATURE header value. Omit to receive the payment quote.",
      -  "type": "string"
      -}
    • removedOutput schema / properties / hint
      Removed value: -{
      -  "description": "How to settle the quote, present when payment_required is true.",
      -  "type": "string"
      -}
    • changedOutput schema / properties / payment_required / description
      Previous value: -"True when this response is an x402 payment quote instead of data: settle one of the quote's `accepts` options and call the tool again with `x_payment`."New value: +"Always false on this connector: every call is billed to the connected Sirenic account, never paid by the client."
    • removedOutput schema / properties / quote
      Removed value: -{
      -  "additionalProperties": {},
      -  "description": "The signable x402 payment requirements when payment_required is true: {x402Version, accepts[]} where each entry carries scheme, network, amount, asset and payTo (USDC and EURC options at the same numeric amount). Sign one entry and call again with `x_payment`.",
      -  "type": "object"
      -}
    • changedOutput schema / properties / resultat / description
      Previous value: -"The endpoint's JSON response when payment_required is false. Paid responses carry `source`, `disclaimer` and an Ed25519 signature, and every paid JSON response carries a `provenance` array (all tools since 2026-09-06) — one entry per block served, with the official register, licence, version, `as_of` date and `precision_as_of` (what that date means), plus the common per-block envelope: `etat` in a closed list (servi, absence_mesuree, absence_non_conclusive, partiel, perime, indisponible, sans_objet), `motif` when unavailable, `age_jours` (only for publication or ingestion dates), `couverture` (complete / partielle / non_mesurable with its measure) and `confiance` in bands (faible / moyenne / forte, only where a measure grounds it, never averaged across blocks). Read the states before the numbers: an absence_non_conclusive, indisponible or partiel block is never « nothing to report » — only absence_mesuree asserts an absence. Register codes: GET /v1/provenance/registres ; states, closed lists and reading rules: GET /v1/lecture (both free). The PDF tools carry no JSON envelope (the PDF report prints it)."New value: +"The endpoint's JSON response when payment_required is false. Paid responses carry `source`, `disclaimer` and an Ed25519 signature, and every paid JSON response carries a `provenance` array (all tools since 2026-09-06), one entry per block served, with the official register, licence, version, `empreinte_sha256` (full snapshots), `as_of` date and `precision_as_of` (what that date means), plus the common per-block envelope: `etat` in a closed list (servi, absence_mesuree, absence_non_conclusive, partiel, perime, indisponible, sans_objet), `motif` when unavailable, `age_jours` (only for publication or ingestion dates), `couverture` (complete / partielle / non_mesurable with its measure) and `confiance` in bands (faible / moyenne / forte, only where a measure grounds it, never averaged across blocks). Read the states before the numbers: an absence_non_conclusive, indisponible or partiel block is never « nothing to report », only absence_mesuree asserts an absence. Register codes: GET /v1/provenance/registres ; states, closed lists and reading rules: GET /v1/lecture (both free)."
  5. Changed1 schema field changed
    • changedOutput schema / properties / resultat / description
      Previous value: -"The endpoint's JSON response when payment_required is false. Paid responses carry `source`, `disclaimer` and an Ed25519 signature; KYB, batch KYB, sanctions, intelligence and the five invoicing tools (prepare_french_invoice_file, prepare_european_invoice_file, prepare_french_einvoicing_recipient, verify_iban_bank, validate_eu_vat_number) also carry a `provenance` array — one entry per block served, with the official register, licence, version, `as_of` date and `precision_as_of` (what that date means). Codes are documented at GET /v1/provenance/registres (free)."New value: +"The endpoint's JSON response when payment_required is false. Paid responses carry `source`, `disclaimer` and an Ed25519 signature, and every paid JSON response carries a `provenance` array (all tools since 2026-09-06) — one entry per block served, with the official register, licence, version, `as_of` date and `precision_as_of` (what that date means), plus the common per-block envelope: `etat` in a closed list (servi, absence_mesuree, absence_non_conclusive, partiel, perime, indisponible, sans_objet), `motif` when unavailable, `age_jours` (only for publication or ingestion dates), `couverture` (complete / partielle / non_mesurable with its measure) and `confiance` in bands (faible / moyenne / forte, only where a measure grounds it, never averaged across blocks). Read the states before the numbers: an absence_non_conclusive, indisponible or partiel block is never « nothing to report » — only absence_mesuree asserts an absence. Register codes: GET /v1/provenance/registres ; states, closed lists and reading rules: GET /v1/lecture (both free). The PDF tools carry no JSON envelope (the PDF report prints it)."
  6. Changed1 schema field changed
    • addedInput schema / properties / api_key
      Added value: +{
      +  "description": "Optional Sirenic API key (srn_live_…) to pay with prepaid credits instead of x402 — no wallet needed. Get one at https://api.sirenic.eu/compte. Ignored when x_payment is provided (the signed payment wins). On insufficient balance the tool returns a credits error, not an x402 quote.",
      +  "type": "string"
      +}
  7. Changed2 schema fields changed
    • changedInput schema / properties / iban / description
      Previous value: -"IBAN (spaces and dashes tolerated)"New value: +"IBAN of the account to check, any ISO 13616 country (spaces and dashes tolerated); bank identification is limited to the registers listed in the tool description"
    • changedOutput schema / properties / resultat / description
      Previous value: -"The endpoint's JSON response when payment_required is false. Paid responses carry `source`, `disclaimer` and an Ed25519 signature; KYB, batch KYB, sanctions and intelligence responses also carry a `provenance` array — one entry per block served, with the official register, licence, version, `as_of` date and `precision_as_of` (what that date means). Codes are documented at GET /v1/provenance/registres (free)."New value: +"The endpoint's JSON response when payment_required is false. Paid responses carry `source`, `disclaimer` and an Ed25519 signature; KYB, batch KYB, sanctions, intelligence and the five invoicing tools (prepare_french_invoice_file, prepare_european_invoice_file, prepare_french_einvoicing_recipient, verify_iban_bank, validate_eu_vat_number) also carry a `provenance` array — one entry per block served, with the official register, licence, version, `as_of` date and `precision_as_of` (what that date means). Codes are documented at GET /v1/provenance/registres (free)."
  8. Changed1 schema field changed
    • changedOutput schema / properties / resultat / description
      Previous value: -"The endpoint's JSON response when payment_required is false. Paid responses carry `source`, `disclaimer` and an Ed25519 signature."New value: +"The endpoint's JSON response when payment_required is false. Paid responses carry `source`, `disclaimer` and an Ed25519 signature; KYB, batch KYB, sanctions and intelligence responses also carry a `provenance` array — one entry per block served, with the official register, licence, version, `as_of` date and `precision_as_of` (what that date means). Codes are documented at GET /v1/provenance/registres (free)."
  9. Changed1 schema field changed
    • changedOutput schema / properties / quote / description
      Previous value: -"The x402 quote (USDC and EURC options at the same numeric amount) when payment_required is true."New value: +"The signable x402 payment requirements when payment_required is true: {x402Version, accepts[]} where each entry carries scheme, network, amount, asset and payTo (USDC and EURC options at the same numeric amount). Sign one entry and call again with `x_payment`."
  10. Changed1 schema field changed
    • changedOutput schema / (root)
      Previous value: -nullNew value: +{
      +  "$schema": "http://json-schema.org/draft-07/schema#",
      +  "additionalProperties": false,
      +  "properties": {
      +    "hint": {
      +      "description": "How to settle the quote, present when payment_required is true.",
      +      "type": "string"
      +    },
      +    "payment_required": {
      +      "description": "True when this response is an x402 payment quote instead of data: settle one of the quote's `accepts` options and call the tool again with `x_payment`.",
      +      "type": "boolean"
      +    },
      +    "quote": {
      +      "additionalProperties": {},
      +      "description": "The x402 quote (USDC and EURC options at the same numeric amount) when payment_required is true.",
      +      "type": "object"
      +    },
      +    "resultat": {
      +      "additionalProperties": {},
      +      "description": "The endpoint's JSON response when payment_required is false. Paid responses carry `source`, `disclaimer` and an Ed25519 signature.",
      +      "type": "object"
      +    }
      +  },
      +  "required": [
      +    "payment_required"
      +  ],
      +  "type": "object"
      +}
  11. Added

TDQS

A4.6/5.0
Behavior5/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations only cover readOnly/openWorld, and the description adds substantial context beyond them: the check is form-level only (ISO 13616 + mod-97), account existence and holder name are never tested, results can be flagged as known documentation samples, responses are Ed25519-signed with per-block provenance and as_of dates, and payment is x402 at $0.005 with a credits fallback. These are exactly the failure modes an agent needs to know before reporting a result.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Dense but front-loaded: the trigger condition comes first, then scope, then exclusions, then output shape, then pricing and citation instruction. Minor waste from repetition — 'the account's existence is not tested' appears twice in different clauses.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness5/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a payment-adjacent verification tool with an output schema, the description covers what is checked, what is deliberately not checked, per-country register coverage, the machine-readable fields (nature_du_controle, non_verifie, exemple_de_documentation), provenance, cost, and the citation requirement. Nothing needed to call or report it correctly is missing.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 100%, so the schema already documents iban, api_key and x_payment. The description adds one useful constraint on the iban parameter (bank identification is limited to the listed registers) but says nothing about api_key/x_payment semantics beyond what the schema states. Baseline 3 applies.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

States a specific verb and resource (IBAN verification + bank identification via official registers) and enumerates the registers actually consulted per country. It is clearly separable from validate_eu_vat_number and prepare_french_invoice_file, which it names explicitly.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines5/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

Gives explicit trigger conditions (paying a NEW or CHANGED IBAN, onboarding supplier bank details), an explicit exclusion ('Explicitly NOT a payee verification'), and an explicit alternative ('call prepare_french_invoice_file instead') for the invoicing-verdict case.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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