edi.ack

Generate the ANSI ASC X12 997 Functional Acknowledgment for a received EDI interchange. POST { edi } with the raw inbound interchange text (the 850/810/856/etc. you received); returns the ready-to-send 997 in meta.ack — sender/receiver mirrored back, delimiters echoed, one ST(997) per inbound functional group with correct AK1 (functional id + group control number), AK2/AK5 per transaction set, and AK9 with accurate included/received/accepted counts. Set status to control the response: A=Accepted (default), E=Accepted with errors, P=Partially accepted, R=Rejected, M/W/X=authentication/security rejection. Deterministic, no external calls. This is the reply leg of EDI: every transaction set you receive is supposed to be acknowledged, and assembling a valid 997 (especially the AK9 counts) is exactly the fiddly envelope bookkeeping agents shouldn't hand-roll.

price

$0.0018 USDC per call

method

POST/api/edi/ack

payment

x402 v2 · USDC on Base (EIP-3009) or Solana (SPL transfer)

auth

None. Sign the payment, retry with PAYMENT-SIGNATURE.

tier

Tier 0 — no paid upstream

Parameters

Name	Type	Description
`edi`required	string	min 106 chars · max 500000 chars
`status`	string	one of: A \| E \| P \| R \| M \| W \| X
`controlNumber`	string	max 15 chars

Code samples

cURLbash

# 1. Probe the endpoint with no auth — receive 402 with PaymentRequirements
curl -sS -X POST 'https://2s.io/api/edi/ack' \
  -H 'Content-Type: application/json' \
  -d '{"edi":"xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx","status":"A","controlNumber":"example"}'

# 2. Sign the EIP-3009 transferWithAuthorization for the advertised price +
#    payTo from the 402 envelope, then retry with PAYMENT-SIGNATURE:
curl -sS -X POST 'https://2s.io/api/edi/ack' \
  -H 'Content-Type: application/json' \
  -H 'PAYMENT-SIGNATURE: <base64-json-payload>' \
  -d '{"edi":"xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx","status":"A","controlNumber":"example"}'

# Or just use the canonical runner — it handles the whole loop:
#   EVM_PRIVATE_KEY=0x... node --env-file=.env.local \
#     --experimental-strip-types scripts/x402-pay.ts \
#     'https://2s.io/api/edi/ack'

TypeScript / Node — @2sio/sdktypescript

import { TwoS } from '@2sio/sdk'

const client = new TwoS({
  privateKey: process.env.EVM_PRIVATE_KEY as `0x${string}`,
})

const result = await client.edi.ack({
  "edi": "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx",
  "status": "A",
  "controlNumber": "example"
})

console.log('endpoint:', result.endpoint)
console.log('cost:', result.costUsd, 'USDC')
console.log('tx:', result.settlement?.txHash)
console.log('data:', result.data)

Python — 2siopython

import os
from twosio import TwoS

client = TwoS(private_key=os.environ["EVM_PRIVATE_KEY"])

result = client.edi.ack(edi="xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx", status="A", controlNumber="example")

print("endpoint:", result.endpoint)
print("cost:", result.cost_usd, "USDC")
print("tx:", (result.settlement or {}).get("tx_hash"))
print("data:", result.data)

MCP — Claude Desktop / AgentKit / any MCP hostjson

// 1. Add @2sio/mcp to your MCP host config (Claude Desktop example below).
//    EVM_PRIVATE_KEY funds x402 payments per call.

// claude_desktop_config.json
{
  "mcpServers": {
    "2sio": {
      "command": "npx",
      "args": ["-y", "@2sio/mcp"],
      "env": { "EVM_PRIVATE_KEY": "0x..." }
    }
  }
}

// 2. Once the server is running, agents call this tool via standard MCP:

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "edi.ack",
    "arguments": {
      "edi": "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx",
      "status": "A",
      "controlNumber": "example"
    }
  }
}

Response

Field	Type	Description
`ok`	boolean	one of: true
`items`	array
`total`	integer	Total matching rows upstream; null when unknown.
`source`	object
`meta`	object

Example response datajson

{
  "ok": true,
  "items": [
    {
      "acknowledgedFunctionalGroup": "example",
      "acknowledgedGroupControlNumber": "example",
      "status": "example",
      "transactionSetsIncluded": 1,
      "transactionSetsReceived": 1,
      "transactionSetsAccepted": 1,
      "transactionSets": [
        {
          "type": "example",
          "controlNumber": "example",
          "response": "example"
        }
      ]
    }
  ],
  "total": 1,
  "source": {
    "provider": "example",
    "url": "example",
    "license": "example"
  },
  "meta": {
    "ack": "example",
    "controlNumber": "example",
    "acknowledges": {
      "senderId": "example",
      "receiverId": "example",
      "interchangeControlNumber": "example",
      "functionalGroupCount": 1,
      "transactionSetCount": 1
    },
    "delimiters": {
      "element": "example",
      "component": "example",
      "segment": "example"
    }
  }
}

Discovery

/api/directory — full catalog of every endpoint
/openapi.json — OpenAPI 3.1 spec (per-op x-payment-info, x402Payment security)
/.well-known/x402 — machine-readable service descriptor for x402-aware crawlers
/.well-known/mcp/server-card.json — MCP SEP-1649 server card
/llms.txt — plain-text manifest for LLM ingestion

2s.io is x402-native. Every call is paid per-request from a USDC-funded EVM wallet on Base — no signup, no API keys, no monthly fees. Source code: github.com/2s-io/sdk.