curl --request POST \
  --url https://api.craftkit.dev/v1/signatures \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "renderId": "3f2a1b4c-5d6e-7f80-9a1b-2c3d4e5f6071",
  "name": "NDA for Acme",
  "recipients": [
    {
      "firstName": "Jane",
      "lastName": "Doe",
      "email": "jane@example.com",
      "designation": "Signer"
    }
  ],
  "anchorTags": [
    {
      "anchorString": "{{sign_here}}",
      "type": "signature",
      "recipientIndex": 0
    }
  ],
  "expirationHours": 168
}
'

import requests

url = "https://api.craftkit.dev/v1/signatures"

payload = {
    "renderId": "3f2a1b4c-5d6e-7f80-9a1b-2c3d4e5f6071",
    "name": "NDA for Acme",
    "recipients": [
        {
            "firstName": "Jane",
            "lastName": "Doe",
            "email": "jane@example.com",
            "designation": "Signer"
        }
    ],
    "anchorTags": [
        {
            "anchorString": "{{sign_here}}",
            "type": "signature",
            "recipientIndex": 0
        }
    ],
    "expirationHours": 168
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    renderId: '3f2a1b4c-5d6e-7f80-9a1b-2c3d4e5f6071',
    name: 'NDA for Acme',
    recipients: [
      {
        firstName: 'Jane',
        lastName: 'Doe',
        email: 'jane@example.com',
        designation: 'Signer'
      }
    ],
    anchorTags: [{anchorString: '{{sign_here}}', type: 'signature', recipientIndex: 0}],
    expirationHours: 168
  })
};

fetch('https://api.craftkit.dev/v1/signatures', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.craftkit.dev/v1/signatures",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'renderId' => '3f2a1b4c-5d6e-7f80-9a1b-2c3d4e5f6071',
    'name' => 'NDA for Acme',
    'recipients' => [
        [
                'firstName' => 'Jane',
                'lastName' => 'Doe',
                'email' => 'jane@example.com',
                'designation' => 'Signer'
        ]
    ],
    'anchorTags' => [
        [
                'anchorString' => '{{sign_here}}',
                'type' => 'signature',
                'recipientIndex' => 0
        ]
    ],
    'expirationHours' => 168
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://api.craftkit.dev/v1/signatures"

	payload := strings.NewReader("{\n  \"renderId\": \"3f2a1b4c-5d6e-7f80-9a1b-2c3d4e5f6071\",\n  \"name\": \"NDA for Acme\",\n  \"recipients\": [\n    {\n      \"firstName\": \"Jane\",\n      \"lastName\": \"Doe\",\n      \"email\": \"jane@example.com\",\n      \"designation\": \"Signer\"\n    }\n  ],\n  \"anchorTags\": [\n    {\n      \"anchorString\": \"{{sign_here}}\",\n      \"type\": \"signature\",\n      \"recipientIndex\": 0\n    }\n  ],\n  \"expirationHours\": 168\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Authorization", "Bearer <token>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://api.craftkit.dev/v1/signatures")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"renderId\": \"3f2a1b4c-5d6e-7f80-9a1b-2c3d4e5f6071\",\n  \"name\": \"NDA for Acme\",\n  \"recipients\": [\n    {\n      \"firstName\": \"Jane\",\n      \"lastName\": \"Doe\",\n      \"email\": \"jane@example.com\",\n      \"designation\": \"Signer\"\n    }\n  ],\n  \"anchorTags\": [\n    {\n      \"anchorString\": \"{{sign_here}}\",\n      \"type\": \"signature\",\n      \"recipientIndex\": 0\n    }\n  ],\n  \"expirationHours\": 168\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.craftkit.dev/v1/signatures")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"renderId\": \"3f2a1b4c-5d6e-7f80-9a1b-2c3d4e5f6071\",\n  \"name\": \"NDA for Acme\",\n  \"recipients\": [\n    {\n      \"firstName\": \"Jane\",\n      \"lastName\": \"Doe\",\n      \"email\": \"jane@example.com\",\n      \"designation\": \"Signer\"\n    }\n  ],\n  \"anchorTags\": [\n    {\n      \"anchorString\": \"{{sign_here}}\",\n      \"type\": \"signature\",\n      \"recipientIndex\": 0\n    }\n  ],\n  \"expirationHours\": 168\n}"

response = http.request(request)
puts response.read_body

{
  "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "renderId": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "name": "<string>",
  "status": "sent",
  "recipients": [
    {
      "id": "<string>",
      "firstName": "<string>",
      "email": "jsmith@example.com",
      "designation": "Signer",
      "lastName": "<string>",
      "order": 123,
      "signedAt": "2023-11-07T05:31:56Z",
      "declinedAt": "2023-11-07T05:31:56Z"
    }
  ],
  "expirationHours": 123,
  "signedDownloadUrl": "<string>",
  "certificateUrl": "<string>",
  "errorMessage": "<string>",
  "createdAt": "2023-11-07T05:31:56Z",
  "completedAt": "2023-11-07T05:31:56Z"
}

{
  "id": "5e4d3c2b-1a0f-9e8d-7c6b-5a4938271605",
  "renderId": "3f2a1b4c-5d6e-7f80-9a1b-2c3d4e5f6071",
  "name": "NDA for Acme",
  "status": "sent",
  "recipients": [
    {
      "id": "temp_1",
      "firstName": "Jane",
      "lastName": "Doe",
      "email": "jane@example.com",
      "designation": "Signer",
      "order": 1
    }
  ],
  "expirationHours": 168,
  "signedDownloadUrl": null,
  "certificateUrl": null,
  "errorMessage": null,
  "createdAt": "2026-06-21T10:00:00.000Z",
  "completedAt": null
}

{
  "error": {
    "code": "invalid_request",
    "message": "Request body did not match expected shape."
  }
}

{
  "error": {
    "code": "unauthorized",
    "message": "Missing Bearer token."
  }
}

{
  "error": {
    "code": "signature_credits_exhausted",
    "message": "The signature service account is out of credits."
  }
}

{
  "error": {
    "code": "not_found",
    "message": "Render not found."
  }
}

{
  "error": {
    "code": "conflict",
    "message": "Render is not ready for signing (status: rendering)."
  }
}

{
  "error": {
    "code": "document_too_large",
    "message": "Rendered PDF exceeds the 20MB signing limit."
  }
}

{
  "error": {
    "code": "signature_provider_error",
    "message": "Signature service rejected the request: ..."
  }
}

{
  "error": {
    "code": "signatures_unavailable",
    "message": "Digital signatures are not configured on this server."
  }
}