---
title: Developer Documentation & API Reference Hub | StanzaAPI Edge APIs
description: Complete developer documentation and API reference for 10 high-performance Cloudflare Edge Micro-APIs: ANSI X12, ISO 20022, IBAN, DSCSA, UDI, VAT, LEI, GS1, and IATA.
canonical: https://stanzaapi.com/docs
---

[Home](/)/[API Directory](/tools/)/Documentation & API Reference

 Master Documentation Hub10 Enterprise Standards4 SDK EcosystemsOpenAPI 3.0 Compatible

# Developer Documentation & API Reference

 Everything you need to integrate, test, and deploy our pure-compute micro-APIs at the edge. Explore quickstart guides, SDK packages, error codes, and interactive API specs.

[Developer Dashboard & Keys →](/dashboard)[View Pricing & SLA](/pricing)

## Zero-Dependency SDK Quickstart

Install official typed client libraries across your language of choice:

TypeScript / Node

### NPM Package

```
npm install @stanzaapi/x12-parser
```

Full TypeScript types, ESM & CJS zero-dependency client.

Python 3.9+

### PyPI Package

```
pip install stanzaapi-x12-parser
```

Type-hinted, sync & async client with urllib/requests.

.NET / C#

### NuGet Package

```
dotnet add package StanzaApi.X12Parser
```

Strongly-typed DTOs for .NET 8 / 9 enterprise workloads.

Rust

### Crates.io

```
cargo add stanzaapi-x12-parser
```

Async Tokio/Reqwest client bindings.

## All 10 Micro-APIs & Interactive Specs

Click on any standard below to explore detailed endpoint parameters, interactive browser sandboxes, and full schema tables:

| Micro-API Name | Category | Supported Formats & Standards | Documentation & Tester |
| --- | --- | --- | --- |
| [Healthcare EDI ANSI X12 Parser API](/x12-parser/) | Healthcare & B2B EDI | EDI X12 837P Professional Health Care Claim Parser & Validator, EDI X12 837I Institutional Claim Parser & Free Validator, EDI 835 Remittance Advice | [Open API Docs →](/x12-parser/) |
| [ISO 20022 Financial Message Parser & Validator API](/iso20022-parser/) | Fintech & Banking | ISO 20022 pacs.008 Credit Transfer Parser & Schema Validator, ISO 20022 pacs.002 Payment Status Parser & Schema Validator, ISO 20022 pain.001 Customer Credit Transfer Initiation Parser | [Open API Docs →](/iso20022-parser/) |
| [FDA DSCSA & EU FMD Prescription Drug Serialization API](/pharma-dscsa/) | Pharmaceutical & Healthcare Compliance | GS1 Verification Router Service , EPCIS 1.2 XML Event Parser & Schema Validator , EPCIS 2.0 JSON-LD Supply Chain Event Parser & Validator | [Open API Docs →](/pharma-dscsa/) |
| [Global IBAN, BIC/SWIFT & Bank Routing Validator API](/iban-validator/) | Fintech & Banking | Andorra , UAE IBAN Number , Albania | [Open API Docs →](/iban-validator/) |
| [EU & UK VAT Validator & Rate Engine API](/vat-validator/) | Tax & E-commerce | EU VAT Rates 2026: Standard & Reduced Rates for All 28 Countries, Austrian VAT Number , Belgian VAT Number | [Open API Docs →](/vat-validator/) |
| [Medical Device UDI Barcode & AIDC Engine](/udi-decoder/) | Medical Devices & Healthcare Regulation | GS1 UDI Barcode Format & AI Parser Guide , HIBCC Medical Device Barcode Decoder & Modulo-43 Checksum Spec, ICCBBA ISBT 128 Medical Device & Cellular Therapy UDI Spec | [Open API Docs →](/udi-decoder/) |
| [GS1 Barcode & Digital Link Decoder (Sunrise 2027) API](/gs1-decoder/) | Retail & Supply Chain | GS1 AI , GS1 AI , GS1 AI | [Open API Docs →](/gs1-decoder/) |
| [IATA Air Cargo AWB & Aviation Validator API](/iata-validator/) | Aviation & Freight Logistics | IATA Resolution 600a Air Waybill , IATA 3-Digit Airline Accounting Prefix Directory & Resolver, IATA 13-Digit E-Ticket Validator & Resolution 722e Check Digit | [Open API Docs →](/iata-validator/) |
| [ISO 6346 Container & Chassis Check-Digit Validator API](/container-validator/) | Maritime & Intermodal Freight | BIC Bureau International des Conteneurs 3-Letter Owner Prefix Spec, ISO 6346 Modulo-11 Shipping Container Check Digit Formula & Step-by-Step, ISO 6346 4-Character Container Size and Type Code Directory | [Open API Docs →](/container-validator/) |
| [Global LEI & Corporate Tax ID Validator API](/lei-validator/) | Entity Identification & Compliance | LEI Number Format Rules & ISO 17442 Check Digit Validator, SWIFT BIC to GLEIF LEI Mapping Standard & Cross-Referencing, ISO 20275 Entity Legal Form | [Open API Docs →](/lei-validator/) |
| [EU CBAM & Carbon Tax Calculation Engine](/cbam-carbon/) | Carbon Border Tax & Regulatory Compliance | EU CBAM Iron & Steel Emissions Calculator [CN 7201-7326 Benchmark API], Aluminum CBAM Embedded Carbon Calculator , Cement & Clinker CBAM Carbon Tax Calculator | [Open API Docs →](/cbam-carbon/) |
| [Peppol BIS Billing 3.0 & EN 16931 E-Invoice Engine](/peppol-validator/) | Electronic Invoicing & Tax Compliance | Peppol BIS Billing 3.0 UBL 2.1 E-Invoice Validator & Parser, Factur-X / ZUGFeRD 2.2 UN/CEFACT CII E-Invoice Parser & Validator, ISO 6523 Electronic Address Scheme | [Open API Docs →](/peppol-validator/) |
| [Factur-X & ZUGFeRD 2.3 E-Invoice Validation Engine](/factur-x-validator/) | Electronic Invoicing & Tax Compliance | Factur-X PDF/A-3 Attachment Extraction & Validation API, ZUGFeRD 2.3 CII E-Invoice Validator & Parser, XRechnung CII Validator API | [Open API Docs →](/factur-x-validator/) |

## Response Envelope Contract

Every microservice in our portfolio adheres to a strictly deterministic JSON envelope contract:

HTTP 200 (Success)

```
{
  "success": true,
  "data": {
    "valid": true,
    "parsed": { ... }
  },
  "meta": {
    "latency_ms": 0.82,
    "version": "1.0.0"
  }
}
```

HTTP 400 / 401 / 429 (Error)

```
{
  "success": false,
  "error": "Descriptive error message",
  "code": "VALIDATION_ERROR"
}
```

## Standard Error Codes

| Error Code | HTTP Status | Description & Remediation |
| --- | --- | --- |
| `VALIDATION_ERROR` | 400 | Malformed payload structure, invalid checksum length, or missing required parameter. |
| `UNAUTHORIZED` | 401 | Invalid or missing `Authorization: Bearer <key>` token. |
| `RATE_LIMITED` | 429 | Per-second rate limit exceeded. Back off and inspect the `Retry-After` header. |
| `QUOTA_EXCEEDED` | 429 | Monthly request quota exceeded on Basic free tier. Upgrade to Pro/Ultra for auto-scaling. |
| `PAYLOAD_TOO_LARGE` | 413 | Payload exceeds the maximum 512KB V8 isolate memory boundary. |
| `NOT_FOUND` | 404 | API route or standard spec not found in directory. |

### Ready to Test Live in Your Browser?

 Every microservice has an unauthenticated live web playground with sample test cases.

[Explore All Tools Directory →](/)[Get API Key](/dashboard)