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2s Validate API

The validate API from 2s — 10 operation(s) for validate.

2s Validate API is one of 114 APIs that 2s publishes on the APIs.io network, described by a machine-readable OpenAPI specification.

Tagged areas include Validate. The published artifact set on APIs.io includes an OpenAPI specification, API documentation, and an API reference.

This API exposes 10 operations across 10 paths, and defines 3 schemas. It is described by OpenAPI 3.2.0, at version 1.

Requests are made against a single base URL, https://2s.io.

10 operations 10 paths 3 schemas 9 GET1 POST

Metadata

The identity and technical contract details declared by the specification.

Specification
OpenAPI 3.2.0
API Version
1
Base URL
https://2s.io/mcp
Authentication
API Key
Contact
Resource Areas
1

Authentication & Security 1

2s Validate API declares 1 security scheme for authenticating requests. An API key is passed in the header as PAYMENT-SIGNATURE (x402Payment).

  • x402Payment — x402 protocol v2: base64-encoded PaymentPayload. Call any paid endpoint without auth to receive a 402 with a multi-network PaymentRequirements envelope. Sign f…

Paths & Operations 10

Across 10 paths, the API surfaces 10 operations — 9 GET, 1 POST. Each is listed below with its method, path, parameters, and response codes.

Validate 10
GET
/api/validate/aba
Validate a US bank ABA routing number with the Federal
validate_aba 2 params → 200400402405500502
POST
/api/validate/batch
Validate up to 100 identifiers of mixed kinds in a single
validate_batch 1 param body → 200400402405500502
GET
/api/validate/bic
Validate a SWIFT/BIC code (ISO 9362): 8 or 11 characters =
validate_bic 2 params → 200400402405500502
GET
/api/validate/cusip
Validate a CUSIP (9-character US/Canada securities
validate_cusip 2 params → 200400402405500502
GET
/api/validate/gln
Validate a GS1 GLN (Global Location Number) - 13 digits
validate_gln 2 params → 200400402405500502
GET
/api/validate/gtin
Validate a product barcode - GTIN-8/12/13/14, UPC-A
validate_gtin 2 params → 200400402405500502
GET
/api/validate/iban
Validate an International Bank Account Number (IBAN) with
validate_iban 2 params → 200400402405500502
GET
/api/validate/isin
Validate an ISIN (International Securities Identification
validate_isin 2 params → 200400402405500502
GET
/api/validate/lei
Validate a Legal Entity Identifier (LEI, ISO 17442) with
validate_lei 2 params → 200400402405500502
GET
/api/validate/sscc
Validate a GS1 SSCC (Serial Shipping Container Code) - 18
validate_sscc 2 params → 200400402405500502

Schemas 3

The contract defines 3 schemas that model the data the API accepts and returns. The most detailed are X402PaymentRequiredV2 (5 properties), Source (3 properties). Each schema is shown below with its type and property counts.

X402PaymentRequiredV2
object
x402 v2 PaymentRequired envelope. Pick any entry from accepts[], sign for that rail, retry with the PAYMENT-SIGNATURE header.
5 properties 2 required
Source
object
Provenance of the data: upstream provider, source URL, and license.
3 properties
CallMeta
object
Per-call meta envelope — endpoint id, cost, caller kind, settlement details.

Specification

The full machine-readable OpenAPI contract behind this narrative.

Source

2s-io-validate-api-openapi.yml Raw ↑

Other APIs 2s publishes across the network.

2s MCP Server
2s A2A Agent
2s Agent API
2s Agriculture API
2s AI API
2s Airport API
2s Aviation API
2s Bank API
2s Barcode API
2s Batch API
2s Bio API
2s Bls API
Where this information came from

This is an independent, third-party profile of 2s Validate API, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.

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