Identifier Validator + Stablecoin Peg Verdict

dev.workers.yuechenxi-importexport.identifier-validator-apiPublished by identifier-validator-api.yuechenxi-importexport.workers.devOfficial publisherv1.0.0Updated Oct 31, 2026

Offline IBAN/BIC/EU VAT/card/ISBN/GTIN validators + live USD stablecoin peg-health verdict.

VerifiedStreamable HTTPWeb executableFinanceBusiness & Commerce

Overview

AI-generated overview

Remote MCP server that validates IBAN, BIC, EU VAT, card, ISBN and GTIN identifiers offline and returns live USD stablecoin peg-health verdicts.

What you can do
  • Validate bank details: check IBAN structure, country rules and mod-97 checksum, and BIC/SWIFT codes
  • Validate tax and product codes: EU/EEA VAT number format and checksum, ISBN-10/13 with conversion, GTIN-8/12/13/14 barcodes
  • Check card numbers with a Luhn test and network detection, returning masked output only
  • Validate up to 25 mixed identifiers of any supported type in a single batch call
  • Assess stablecoins: live peg-health verdict, risk score, price deviation and supply/liquidity data from DefiLlama
When to use it
Useful when an assistant needs to sanity-check payment, banking, tax or product identifiers before they are used, or when you want a quick read on whether a USD stablecoin is holding its peg. Good for data-entry validation and batch cleanup of identifier lists.
Requirements
Remote streamable HTTP endpoint; no installation, account, API key or environment variables are declared. Network access is needed for the stablecoin verdict, which pulls live DefiLlama data. The free tier allows 30 calls per hour per client; unlimited use is paid per call via x402 in USDC.
Before you install
The validators are structural only: they cannot confirm an account exists, and VAT numbers are not checked against VIES registration. Card numbers are sent to a third-party endpoint, though output is masked and nothing is stored. The stablecoin verdict is informational, not financial advice. Exceeding the free tier requires paying per call in USDC via x402.

Installation

In SourceWeft

  1. Open Identifier Validator + Stablecoin Peg Verdict in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/dev.workers.yuechenxi-importexport.identifier-validator-api%2Fidentifier-validator/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config.

{
  "mcpServers": {
    "identifier-validator-stablecoin-peg-verd": {
      "type": "http",
      "url": "https://identifier-validator-api.yuechenxi-importexport.workers.dev/mcp"
    }
  }
}

Tools

8

validate_iban

Validate IBAN

Validate an IBAN offline: country rules, length, BBAN structure, mod-97 checksum. Returns validity, country, SEPA flag and formatted IBAN. Structural check only: cannot tell whether the account exists.

Parametersibanrequired

validate_bic

Validate BIC/SWIFT

Validate a BIC/SWIFT code structure (8 or 11 chars), country, location and branch code.

Parametersbicrequired

validate_vat

Validate EU VAT number

Validate an EU/EEA (plus GB, NO, CH and more) VAT number format and checksum offline. Does not check VIES registration status.

Parametersvatrequiredcountry

validate_card

Validate payment card number

Luhn check and network detection (Visa, Mastercard, Amex, Discover, Diners, JCB, UnionPay, Maestro, Mir). Returns masked output only; nothing is stored.

Parametersnumberrequired

validate_isbn

Validate ISBN

Validate ISBN-10 or ISBN-13 check digit and convert between the two.

Parametersisbnrequired

validate_gtin

Validate GTIN/EAN/UPC

Validate GTIN-8/12/13/14 (EAN/UPC barcode) check digit.

Parameterscoderequired

validate_batch

Validate many identifiers

Validate up to 25 mixed identifiers (iban, bic, vat, card, isbn, gtin) in one call.

Parametersitemsrequired

stablecoin_peg_verdict

Stablecoin peg verdict

Live peg-health verdict for USD stablecoins: PEGGED / WATCH / DEPEG_RISK / DEPEGGED, 0-100 risk score, price deviation in bps, 1d/7d/30d supply change and per-chain liquidity, computed from DefiLlama (cached 5 min). Free tier: 30 calls/hour per client; for unlimited use pay per call via x402 (USDC on Base, $0.005): https://identifier-validator-api.yuechenxi-importexport.workers.dev/x402/v1/stablecoin-peg. Informational only, not financial advice.

Parametersassetrequiredchain

Version history

1
  1. v1.0.0LatestOct 31, 2026

Score

72% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 daysRequired25 pts
  • Auth declaredRequired10 pts
  • Tools listedRequired15 pts
  • DescriptionRequired15 pts
  • Logo10 pts

    Publish an icon in the registry entry.

  • Documentation15 pts

    Declare a GitHub repository with a README, or serve resource_documentation in the OAuth protected-resource metadata.

  • LicenseNot applicable

    A hosted service is used under its provider's terms, so no license is expected here. This check is left out of the percentage.