curl --request POST \
  --url https://commet.co/api/v1/plans/{id}/prices \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --data '
{
  "price": 4503599627370495,
  "marketPrices": [
    {
      "marketGroupId": "<string>",
      "price": 4503599627370495
    }
  ]
}
'

import { Commet } from "@commet/node";

const commet = new Commet({ apiKey: "ck_xxx" });

const planPrice = await commet.plans.addPrice({
  id: "pln_xxx",
  billingInterval: "weekly",
  price: 1,
});

from commet import Commet

commet = Commet("ck_xxx")

plan_price = commet.plans.add_price(
    "pln_xxx",
    billing_interval="weekly",
    price=1,
)

client, err := commet.New("ck_xxx")
if err != nil {
	log.Fatal(err)
}
ctx := context.Background()

planPrice, err := client.Plans.AddPrice(ctx, "pln_xxx", &commet.AddPlanPriceParams{
	BillingInterval: "weekly",
	Price: func(value int) *int { return &value }(1),
})
if err != nil {
	log.Fatal(err)
}

import co.commet.Commet;
import co.commet.params.AddPlanPriceParams;

var commet = Commet.builder().apiKey("ck_xxx").build();

var planPrice = commet.plans().addPrice(
    "pln_xxx",
    AddPlanPriceParams.builder("weekly").price(1L).build()
);

use Commet\Commet;

$commet = new Commet('ck_xxx');

$planPrice = $commet->plans->addPrice(
    id: 'pln_xxx',
    billingInterval: 'weekly',
    price: 1,
);

{
  "id": "price_1a2b3c4d",
  "planId": "plan_1a2b3c4d",
  "billingInterval": "monthly",
  "price": 2000,
  "isDefault": true,
  "trialDays": 0,
  "includedBalance": null,
  "includedCredits": null,
  "offerId": null,
  "inheritsFromPriceId": null,
  "metadata": {},
  "marketPrices": [],
  "createdAt": "2026-09-07T12:00:00.000Z",
  "updatedAt": "2026-09-07T12:00:00.000Z",
  "object": "plan_price",
  "livemode": false
}

{
  "error": {
    "type": "validation_error",
    "code": "validation_error",
    "message": "The request contains an invalid parameter.",
    "doc_url": "https://commet.co/docs/api-reference/2026-08-27/errors/validation_error.md"
  }
}

{
  "error": {
    "type": "authentication_error",
    "code": "unauthorized",
    "message": "A valid API key is required.",
    "doc_url": "https://commet.co/docs/api-reference/2026-08-27/errors/unauthorized.md"
  }
}

{
  "error": {
    "type": "authentication_error",
    "code": "forbidden",
    "message": "You do not have permission to perform this operation.",
    "doc_url": "https://commet.co/docs/api-reference/2026-08-27/errors/forbidden.md"
  }
}

{
  "error": {
    "type": "not_found_error",
    "code": "not_found",
    "message": "The requested resource was not found.",
    "doc_url": "https://commet.co/docs/api-reference/2026-08-27/errors/not_found.md"
  }
}

{
  "error": {
    "type": "conflict_error",
    "code": "idempotency_in_progress",
    "message": "A request with this idempotency key is still being processed.",
    "doc_url": "https://commet.co/docs/api-reference/2026-08-27/errors/idempotency_in_progress.md"
  }
}

{
  "error": {
    "type": "rate_limit_error",
    "code": "rate_limited",
    "message": "Too many requests. Retry after the interval specified in the Retry-After header.",
    "doc_url": "https://commet.co/docs/api-reference/2026-08-27/errors/rate_limited.md"
  }
}

{
  "error": {
    "type": "internal_error",
    "code": "internal_error",
    "message": "An unexpected error occurred while processing the request.",
    "doc_url": "https://commet.co/docs/api-reference/2026-08-27/errors/internal_error.md"
  }
}

{
  "error": {
    "type": "internal_error",
    "code": "idempotency_unavailable",
    "message": "Idempotency storage is temporarily unavailable. Retry with the same idempotency key.",
    "doc_url": "https://commet.co/docs/api-reference/2026-08-27/errors/idempotency_unavailable.md"
  }
}