Getting started

Base URL & conventions

Base URL	https://calc.dev.emrgex.com
Prefix	every endpoint is under /v1
Rates & yields	decimals — 0.06 means 6%
Prices	per 100 of face value
Dates	ISO YYYY-MM-DD
Content type	application/json

Your first request

Price a stored instrument — reference it by instrument_id and give a yield:

curl -s https://calc.dev.emrgex.com/v1/quotes \
  -H 'content-type: application/json' \
  -d '{
    "quotes": [
      { "instrument_id": "MH12034", "input_kind": "yield", "input_value": 0.10,
        "settlement_date": "2026-06-09", "options": { "round": 6 } }
    ]
  }'

The response is a batch envelope — one entry per quote, each with its own status:

{
  "data": [
    {
      "index": 0,
      "id": "MH12034",
      "status": "ok",
      "data": {
        "instrument_id": "MH12034",
        "convention": "NOMINAL · ACT/ACT.DRMH",
        "calculation_code": "ACT/ACT.DRMH|NOMINAL",
        "metrics": {
          "yield": 0.1,
          "dirty_price": 112.547645,
          "clean_price": 107.853124,
          "accrued_interest": 4.694521,
          "modified_duration": 5.12,
          "convexity": 33.7,
          "dv01": 0.0576
        }
      }
    }
  ]
}

Price by price instead of yield

Set input_kind to clean_price or dirty_price and emrgex solves the yield for you:

{ "instrument_id": "MH12034", "input_kind": "clean_price", "input_value": 107.85,
  "settlement_date": "2026-06-09", "options": { "round": 6 } }

Define your own bond (ad-hoc)

Put the instrument inline in instruments, then reference its id from quotes:

curl -s https://calc.dev.emrgex.com/v1/quotes \
  -H 'content-type: application/json' \
  -d '{
    "instruments": [
      { "id": "B1", "rate_type": "NOMINAL", "day_count": "ACT/ACT.ICMA",
        "coupon_type": "FIXED", "frequency": 2,
        "start": "2020-01-15", "maturity": "2030-01-15",
        "coupon_rate": 0.06, "face_value": 100 }
    ],
    "quotes": [
      { "instrument_id": "B1", "input_kind": "clean_price", "input_value": 95.5,
        "settlement_date": "2024-06-18", "options": { "round": 6 } }
    ]
  }'

Add a trade size

Supply an amount to get money figures (settlement amounts) alongside the per-100 prices:

{ "instrument_id": "MH12034", "input_kind": "yield", "input_value": 0.10,
  "amount_kind": "nominal", "amount_value": 1000000,
  "settlement_date": "2026-06-09", "options": { "round": 6 } }

Health check

curl https://calc.dev.emrgex.com/v1/health/livez
# {"status":"alive"}

:::tip Performance To price in bulk, send many quotes in one /v1/quotes request (a batch). Leave with_cashflows off unless you need each bond's schedule — it makes responses much smaller and faster. :::

:::note Authentication The development service is currently open (no API key). Production deployments can enable HMAC request signing. :::