First version 1.0

db.json

@@ -0,0 +1,90 @@
+[
+    {
+        "Name": "AdotpAPet API Key",
+        "Regex": "^\\s*([a-z0-9]{33})\\z"
+    },
+    {
+        "Name": "IUCN API Key",
+        "Regex": "^\\s*([a-z0-9]{64})\\z"
+    },
+    {
+        "Name": "TheCatAPI API Key",
+        "Regex": "[a-f0-9]{8}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{4}-[0-9a-f]{12}"
+    },
+    {
+        "Name": "TheDogAPI API Key",
+        "Regex": "[a-f0-9]{8}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{4}-[0-9a-f]{12}"
+    },
+    {
+        "Name": "AniAPI OAuth Token",
+        "Regex": "^[A-Za-z0-9-_=]+\\.[A-Za-z0-9-_=]+\\.?[A-Za-z0-9-_.+/=]*$"
+    },
+    {
+        "Name": "MyAnimeList OAuth Token",
+        "Regex": "^[A-Za-z0-9-_=]+\\.[A-Za-z0-9-_=]+\\.?[A-Za-z0-9-_.+/=]*$"
+    },
+    {
+        "Name": "AbuseIPDB API Key",
+        "Regex": "^\\s*([a-z0-9]{80})\\z"
+    },
+    {
+        "Name": "AlienVault Open Threat Exchange API Key",
+        "Regex": "^\\s*([a-z0-9]{64})\\z"
+    },
+    {
+        "Name": "Google Safe Browsing API Key",
+        "Regex": "AIza[0-9A-Za-z-_]{35}"
+    },
+    {
+        "Name": "URLScan API Key",
+        "Regex": "[a-f0-9]{8}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{12}"
+    },
+    {
+        "Name": "VirusTotal API Key",
+        "Regex": "^\\s*([a-z0-9]{64})\\z"
+    },
+    {
+        "Name": "Cooper Hewitt API Key",
+        "Regex": "^\\s*([a-z0-9]{32})\\z"
+    },
+    {
+        "Name": "Dribbble API Key",
+        "Regex": "^\\s*([a-z0-9]{64})\\z"
+    },
+    {
+        "Name": "Europeana API Key",
+        "Regex": "^\\s*([a-z]{8,10})\\z"
+    },
+    {
+        "Name": "IconFinder API Key",
+        "Regex": "^\\s*([a-zA-Z0-9]{64})\\z"
+    },
+    {
+        "Name": "Rijksmuseum API Key",
+        "Regex": "^\\s*([a-zA-Z0-9]{8})\\z"
+    },
+    {
+        "Name": "Micro User Service API Key",
+        "Regex": "^\\s*([a-z0-9]{48})\\z"
+    },
+    {
+        "Name": "Covalent API Key",
+        "Regex": "ckey_[a-z0-9]{27}"
+    },
+    {
+        "Name": "Etherscan API Key",
+        "Regex": "^\\s*([A-Z0-9]{34})\\z"
+    },
+    {
+        "Name": "Nownodes API Key",
+        "Regex": "^\\s*([A-Za-z0-9]{32})\\z"
+    },
+    {
+        "Name": "API Bible API Key",
+        "Regex": "^\\s*([a-z0-9]{32})\\z"
+    },
+    {
+        "Name": "Google Books API Key",
+        "Regex": "AIza[0-9A-Za-z-_]{35}"
+    }
+]

go.mod

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+module ApiGuesser
+
+go 1.16
+
+replace github.com/daffainfo/ApiGuesser => /ApiGuesser

main.go

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+package main
+
+import (
+	"bufio"
+	"encoding/json"
+	"flag"
+	"fmt"
+	"io/ioutil"
+	"log"
+	"net/http"
+	"os"
+	"regexp"
+)
+
+type regex_data struct {
+	Name  string `json:"Name"`
+	Regex string `json:"Regex"`
+}
+
+func show_banner() {
+	fmt.Println(`                                          
+         _                                 
+ ___ ___|_|___ ___ _ _ ___ ___ ___ ___ ___ 
+| .'| . | |___| . | | | -_|_ -|_ -| -_|  _|
+|__,|  _|_|   |_  |___|___|___|___|___|_|  
+    |_|       |___|                        
+
+Author: Muhammad Daffa
+Version: 1.0`)
+}
+
+func Regex_api_file(path string) {
+	file, err := os.Open(path)
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer file.Close()
+
+	scanner := bufio.NewScanner(file)
+	for scanner.Scan() {
+		fmt.Println(scanner.Text())
+		Regex_api(scanner.Text())
+	}
+
+	if err := scanner.Err(); err != nil {
+		log.Fatal(err)
+	}
+}
+
+func Regex_api(contents string) {
+	var data []regex_data
+
+	resp, err := http.Get("https://raw.githubusercontent.com/daffainfo/ApiGuesser/main/db.json")
+	if err != nil {
+		fmt.Println("No response from request")
+	}
+	defer resp.Body.Close()
+
+	byteValue, _ := ioutil.ReadAll(resp.Body)
+
+	var errjson = json.Unmarshal([]byte(byteValue), &data)
+	if errjson != nil {
+		fmt.Println(err.Error())
+		return
+	}
+
+	for i := range data {
+		re := regexp.MustCompile(data[i].Regex)
+		if re.MatchString(contents) {
+			res1 := re.FindAllString(contents, 1)
+			fmt.Println("[+] "+data[i].Name, " ", res1)
+		}
+	}
+}
+
+func main() {
+	show_banner()
+	api := flag.String("api", "", "An API Key. Example: tue3sv9hzsey1me4l7fwq3t46u5k8wag")
+	path := flag.String("path", "", "A file with API Key. Example: daffainfo.txt")
+	flag.Parse()
+
+	if *api != "" && *path == "" && len(*api) > 3 {
+		fmt.Println("Possible API Key:")
+		Regex_api(*api)
+	} else if *api == "" && *path != "" {
+		Regex_api_file(*path)
+	} else if *api != "" || *path != "" {
+		fmt.Println("Can't call 2 arguments at once")
+	}
+}