diff --git a/src/app.ts b/src/app.ts
index 71a85bd..e02953c 100644
--- a/src/app.ts
+++ b/src/app.ts
@@ -32,6 +32,7 @@ import {endpoint as getSegmentInfo} from './routes/getSegmentInfo';
 import {postClearCache} from './routes/postClearCache';
 import { addUnlistedVideo } from './routes/addUnlistedVideo';
 import {postPurgeAllSegments} from './routes/postPurgeAllSegments';
+import {getUserID} from './routes/getUserID';
 
 export function createServer(callback: () => void) {
     // Create a service (the app object is just a callback).
@@ -146,6 +147,9 @@ function setupRoutes(app: Express) {
     app.post('/api/purgeAllSegments', postPurgeAllSegments);
 
     app.post('/api/unlistedVideo', addUnlistedVideo);
+    
+    // get userID from username
+    app.get('/api/userID', getUserID);
 
     if (config.postgres) {
         app.get('/database', (req, res) => dumpDatabase(req, res, true));
diff --git a/src/routes/getUserID.ts b/src/routes/getUserID.ts
new file mode 100644
index 0000000..6ecc1b7
--- /dev/null
+++ b/src/routes/getUserID.ts
@@ -0,0 +1,55 @@
+import {db} from '../databases/databases';
+import {Request, Response} from 'express';
+import {UserID} from '../types/user.model';
+
+function getFuzzyUserID(userName: String): Promise<{userName: String, userID: UserID }[]>  {
+    // escape [_ % \] to avoid ReDOS
+    userName = userName.replace(/\\/g, '\\\\')
+        .replace(/_/g, '\\_')
+        .replace(/%/g, '\\%');
+    userName = `%${userName}%`; // add wildcard to username
+    // LIMIT to reduce overhead | ESCAPE to escape LIKE wildcards
+    try {
+        return db.prepare('all', `SELECT "userName", "userID" FROM "userNames" WHERE "userName"
+        LIKE ? ESCAPE '\\' LIMIT 10`, [userName])
+    } catch (err) {
+        return null;
+    }
+}
+
+function getExactUserID(userName: String): Promise<{userName: String, userID: UserID }[]>  {
+    try {
+        return db.prepare('all', `SELECT "userName", "userID" from "userNames" WHERE "userName" = ? LIMIT 10`, [userName]);
+    } catch (err) {
+        return null;
+    }
+}
+
+export async function getUserID(req: Request, res: Response) {
+    let userName = req.query.username as string;
+    const exactSearch = req.query.exact
+        ? req.query.exact == "true"
+        : false as Boolean;
+    
+    // if not exact and length is 1, also skip
+    if (userName == undefined || userName.length > 64 ||
+        (!exactSearch && userName.length < 3)) {
+        // invalid request
+        res.sendStatus(400);
+        return false;
+    }
+    const results = exactSearch
+        ? await getExactUserID(userName)
+        : await getFuzzyUserID(userName);
+
+    if (results === undefined || results === null) {
+        res.sendStatus(500);
+        return false;
+    } else if (results.length === 0) {
+        res.sendStatus(404);
+        return false;
+    } else {
+        res.send(results);
+        return false;
+    }
+}
diff --git a/test/cases/getSegmentInfo.ts b/test/cases/getSegmentInfo.ts
index 3f03027..a6c2f0d 100644
--- a/test/cases/getSegmentInfo.ts
+++ b/test/cases/getSegmentInfo.ts
@@ -3,20 +3,20 @@ import {db} from '../../src/databases/databases';
 import {Done, getbaseURL} from '../utils';
 import {getHash} from '../../src/utils/getHash';
 
-const ENOENTID =        "0000000000000000000000000000000000000000000000000000000000000000"
-const upvotedID =       "a000000000000000000000000000000000000000000000000000000000000000"
-const downvotedID =     "b000000000000000000000000000000000000000000000000000000000000000"
-const lockedupID =      "c000000000000000000000000000000000000000000000000000000000000000"
-const infvotesID =      "d000000000000000000000000000000000000000000000000000000000000000"
-const shadowhiddenID =  "e000000000000000000000000000000000000000000000000000000000000000"
-const lockeddownID =    "f000000000000000000000000000000000000000000000000000000000000000"
-const hiddenID =        "1000000000000000000000000000000000000000000000000000000000000000"
-const fillerID1 =       "1100000000000000000000000000000000000000000000000000000000000000"
-const fillerID2 =       "1200000000000000000000000000000000000000000000000000000000000000"
-const fillerID3 =       "1300000000000000000000000000000000000000000000000000000000000000"
-const fillerID4 =       "1400000000000000000000000000000000000000000000000000000000000000"
-const fillerID5 =       "1500000000000000000000000000000000000000000000000000000000000000"
-const oldID =           "a0000000-0000-0000-0000-000000000000"
+const ENOENTID =        "0".repeat(64);
+const upvotedID =       "a"+"0".repeat(63);
+const downvotedID =     "b"+"0".repeat(63);
+const lockedupID =      "c"+"0".repeat(63);
+const infvotesID =      "d"+"0".repeat(63);
+const shadowhiddenID =  "e"+"0".repeat(63);
+const lockeddownID =    "f"+"0".repeat(63);
+const hiddenID =        "1"+"0".repeat(63);
+const fillerID1 =       "11"+"0".repeat(62);
+const fillerID2 =       "12"+"0".repeat(62);
+const fillerID3 =       "13"+"0".repeat(62);
+const fillerID4 =       "14"+"0".repeat(62);
+const fillerID5 =       "15"+"0".repeat(62);
+const oldID =           `${'0'.repeat(8)}-${'0000-'.repeat(3)}${'0'.repeat(12)}`;
 
 describe('getSegmentInfo', () => {
     before(async () => {
diff --git a/test/cases/getUserID.ts b/test/cases/getUserID.ts
new file mode 100644
index 0000000..7fe5d70
--- /dev/null
+++ b/test/cases/getUserID.ts
@@ -0,0 +1,403 @@
+import fetch from 'node-fetch';
+import {Done, getbaseURL} from '../utils';
+import {db} from '../../src/databases/databases';
+import {getHash} from '../../src/utils/getHash';
+
+describe('getUserID', () => {
+    before(async () => {
+        const insertUserNameQuery = 'INSERT INTO "userNames" ("userID", "userName") VALUES(?, ?)';
+        await db.prepare("run", insertUserNameQuery, [getHash("getuserid_user_01"), 'fuzzy user 01']);
+        await db.prepare("run", insertUserNameQuery, [getHash("getuserid_user_02"), 'fuzzy user 02']);
+        await db.prepare("run", insertUserNameQuery, [getHash("getuserid_user_03"), 'specific user 03']);
+        await db.prepare("run", insertUserNameQuery, [getHash("getuserid_user_04"), 'repeating']);
+        await db.prepare("run", insertUserNameQuery, [getHash("getuserid_user_05"), 'repeating']);
+        await db.prepare("run", insertUserNameQuery, [getHash("getuserid_user_06"), getHash("getuserid_user_06")]);
+        await db.prepare("run", insertUserNameQuery, [getHash("getuserid_user_07"), '0redos0']);
+        await db.prepare("run", insertUserNameQuery, [getHash("getuserid_user_08"), '%redos%']);
+        await db.prepare("run", insertUserNameQuery, [getHash("getuserid_user_09"), '_redos_']);
+        await db.prepare("run", insertUserNameQuery, [getHash("getuserid_user_10"), 'redos\\%']);
+        await db.prepare("run", insertUserNameQuery, [getHash("getuserid_user_11"), '\\\\\\']);
+        await db.prepare("run", insertUserNameQuery, [getHash("getuserid_user_12"), 'a']);
+    });
+
+    it('Should be able to get a 200', (done: Done) => {
+        fetch(getbaseURL() + '/api/userID?username=fuzzy+user+01')
+        .then(async res => {
+            const text = await res.text()
+            if (res.status !== 200) done('non 200 (' + res.status + ')');
+            else done(); // pass
+        })
+        .catch(err => done('couldn\'t call endpoint'));
+    });
+
+    it('Should be able to get a 400 (No username parameter)', (done: Done) => {
+        fetch(getbaseURL() + '/api/userID')
+        .then(res => {
+            if (res.status !== 400) done('non 400 (' + res.status + ')');
+            else done(); // pass
+        })
+        .catch(err => done('couldn\'t call endpoint'));
+    });
+
+    it('Should be able to get a 200 (username is public id)', (done: Done) => {
+        fetch(getbaseURL() + '/api/userID?username='+getHash("getuserid_user_06"))
+        .then(async res => {
+            const text = await res.text()
+            if (res.status !== 200) done('non 200 (' + res.status + ')');
+            else done(); // pass
+        })
+        .catch(err => done('couldn\'t call endpoint'));
+    });
+
+    it('Should be able to get a 400 (username longer than 64 chars)', (done: Done) => {
+        fetch(getbaseURL() + '/api/userID?username='+getHash("getuserid_user_06")+'0')
+        .then(res => {
+            if (res.status !== 400) done('non 400 (' + res.status + ')');
+            else done(); // pass
+        })
+        .catch(err => done('couldn\'t call endpoint'));
+    });
+
+    it('Should be able to get single username', (done: Done) => {
+        fetch(getbaseURL() + '/api/userID?username=fuzzy+user+01')
+        .then(async res => {
+            if (res.status !== 200) {
+                done("non 200");
+            } else {
+                const data = await res.json();
+                if (data.length !== 1) {
+                    done('Returned incorrect number of users "' + data.length + '"');
+                } else if (data[0].userName !== "fuzzy user 01") {
+                    done('Returned incorrect username "' + data.userName + '"');
+                } else if (data[0].userID !== getHash("getuserid_user_01")) {
+                    done('Returned incorrect userID "' + data.userID + '"');
+                } else {
+                    done(); // pass
+                }
+            }
+        })
+        .catch(err => ("couldn't call endpoint"));
+    });
+
+    it('Should be able to get multiple fuzzy user info from start', (done: Done) => {
+        fetch(getbaseURL() + '/api/userID?username=fuzzy+user')
+        .then(async res => {
+            if (res.status !== 200) {
+                done("non 200");
+            } else {
+                const data = await res.json();
+                if (data.length !== 2) {
+                    done('Returned incorrect number of users "' + data.length + '"');
+                } else if (data[0].userName !== "fuzzy user 01") {
+                    done('Returned incorrect username "' + data.userName + '"');
+                } else if (data[0].userID !== getHash("getuserid_user_01")) {
+                    done('Returned incorrect userID "' + data.userID + '"');
+                } else if (data[1].userName !== "fuzzy user 02") {
+                    done('Returned incorrect username "' + data.userName + '"');
+                } else if (data[1].userID !== getHash("getuserid_user_02")) {
+                    done('Returned incorrect userID "' + data.userID + '"');
+                } else {
+                    done(); // pass
+                }
+            }
+        })
+        .catch(err => ("couldn't call endpoint"));
+    });
+
+    it('Should be able to get multiple fuzzy user info from middle', (done: Done) => {
+        fetch(getbaseURL() + '/api/userID?username=user')
+        .then(async res => {
+            if (res.status !== 200) {
+                done("non 200");
+            } else {
+                const data = await res.json();
+                if (data.length !== 3) {
+                    done('Returned incorrect number of users "' + data.length + '"');
+                } else if (data[0].userName !== "fuzzy user 01") {
+                    done('Returned incorrect username "' + data.userName + '"');
+                } else if (data[0].userID !== getHash("getuserid_user_01")) {
+                    done('Returned incorrect userID "' + data.userID + '"');
+                } else if (data[1].userName !== "fuzzy user 02") {
+                    done('Returned incorrect username "' + data.userName + '"');
+                } else if (data[1].userID !== getHash("getuserid_user_02")) {
+                    done('Returned incorrect userID "' + data.userID + '"');
+                } else if (data[2].userName !== "specific user 03") {
+                    done('Returned incorrect username "' + data.userName + '"');
+                } else if (data[2].userID !== getHash("getuserid_user_03")) {
+                    done('Returned incorrect userID "' + data.userID + '"');
+                } else {
+                    done(); // pass
+                }
+            }
+        })
+        .catch(err => ("couldn't call endpoint"));
+    });
+
+    it('Should be able to get with public ID', (done: Done) => {
+        const userID = getHash("getuserid_user_06");
+        fetch(getbaseURL() + '/api/userID?username='+userID)
+        .then(async res => {
+            if (res.status !== 200) {
+                done("non 200");
+            } else {
+                const data = await res.json();
+                if (data.length !== 1) {
+                    done('Returned incorrect number of users "' + data.length + '"');
+                } else if (data[0].userName !== userID) {
+                    done('Returned incorrect username "' + data.userName + '"');
+                } else if (data[0].userID !== userID) {
+                    done('Returned incorrect userID "' + data.userID + '"');
+                } else {
+                    done(); // pass
+                }
+            }
+        })
+        .catch(err => ("couldn't call endpoint"));
+    });
+
+    it('Should be able to get with fuzzy public ID', (done: Done) => {
+        const userID = getHash("getuserid_user_06");
+        fetch(getbaseURL() + '/api/userID?username='+userID.substr(10,60))
+        .then(async res => {
+            if (res.status !== 200) {
+                done("non 200");
+            } else {
+                const data = await res.json();
+                if (data.length !== 1) {
+                    done('Returned incorrect number of users "' + data.length + '"');
+                } else if (data[0].userName !== userID) {
+                    done('Returned incorrect username "' + data.userName + '"');
+                } else if (data[0].userID !== userID) {
+                    done('Returned incorrect userID "' + data.userID + '"');
+                } else {
+                    done(); // pass
+                }
+            }
+        })
+        .catch(err => ("couldn't call endpoint"));
+    });
+
+    it('Should be able to get repeating username', (done: Done) => {
+        fetch(getbaseURL() + '/api/userID?username=repeating')
+        .then(async res => {
+            if (res.status !== 200) {
+                done("non 200");
+            } else {
+                const data = await res.json();
+                if (data.length !== 2) {
+                    done('Returned incorrect number of users "' + data.length + '"');
+                } else if (data[0].userName !== "repeating") {
+                    done('Returned incorrect username "' + data.userName + '"');
+                } else if (data[0].userID !== getHash("getuserid_user_04")) {
+                    done('Returned incorrect userID "' + data.userID + '"');
+                } else if (data[1].userName !== "repeating") {
+                    done('Returned incorrect username "' + data.userName + '"');
+                } else if (data[1].userID !== getHash("getuserid_user_05")) {
+                    done('Returned incorrect userID "' + data.userID + '"');
+                } else {
+                    done(); // pass
+                }
+            }
+        })
+        .catch(err => ("couldn't call endpoint"));
+    });
+
+    it('Should be able to get repeating fuzzy username', (done: Done) => {
+        fetch(getbaseURL() + '/api/userID?username=peat')
+        .then(async res => {
+            if (res.status !== 200) {
+                done("non 200");
+            } else {
+                const data = await res.json();
+                if (data.length !== 2) {
+                    done('Returned incorrect number of users "' + data.length + '"');
+                } else if (data[0].userName !== "repeating") {
+                    done('Returned incorrect username "' + data.userName + '"');
+                } else if (data[0].userID !== getHash("getuserid_user_04")) {
+                    done('Returned incorrect userID "' + data.userID + '"');
+                } else if (data[1].userName !== "repeating") {
+                    done('Returned incorrect username "' + data.userName + '"');
+                } else if (data[1].userID !== getHash("getuserid_user_05")) {
+                    done('Returned incorrect userID "' + data.userID + '"');
+                } else {
+                    done(); // pass
+                }
+            }
+        })
+        .catch(err => ("couldn't call endpoint"));
+    });
+
+    it('should avoid ReDOS with _', (done: Done) => {
+        fetch(getbaseURL() + '/api/userID?username=_redos_')
+        .then(async res => {
+            if (res.status !== 200) {
+                done("non 200");
+            } else {
+                const data = await res.json();
+                if (data.length !== 1) {
+                    done('Returned incorrect number of users "' + data.length + '"');
+                } else if (data[0].userName !== "_redos_") {
+                    done('Returned incorrect username "' + data.userName + '"');
+                } else if (data[0].userID !== getHash("getuserid_user_09")) {
+                    done('Returned incorrect userID "' + data.userID + '"');
+                } else {
+                    done(); // pass
+                }
+            }
+        })
+        .catch(err => ("couldn't call endpoint"));
+    });
+
+    it('should avoid ReDOS with %', (done: Done) => {
+        fetch(getbaseURL() + '/api/userID?username=%redos%')
+        .then(async res => {
+            if (res.status !== 200) {
+                done("non 200");
+            } else {
+                const data = await res.json();
+                if (data.length !== 1) {
+                    done('Returned incorrect number of users "' + data.length + '"');
+                } else if (data[0].userName !== "%redos%") {
+                    done('Returned incorrect username "' + data.userName + '"');
+                } else if (data[0].userID !== getHash("getuserid_user_08")) {
+                    done('Returned incorrect userID "' + data.userID + '"');
+                } else {
+                    done(); // pass
+                }
+            }
+        })
+        .catch(err => ("couldn't call endpoint"));
+    });
+
+    it('should return 404 if escaped backslashes present', (done: Done) => {
+        fetch(getbaseURL() + '/api/userID?username=%redos\\\\_')
+        .then(res => {
+            if (res.status !== 404) done('non 404 (' + res.status + ')');
+            else done(); // pass
+        })
+        .catch(err => ("couldn't call endpoint"));
+    });
+
+    it('should return 404 if backslashes present', (done: Done) => {
+        fetch(getbaseURL() + '/api/userID?username=\\%redos\\_')
+        .then(res => {
+            if (res.status !== 404) done('non 404 (' + res.status + ')');
+            else done(); // pass
+        })
+        .catch(err => ("couldn't call endpoint"));
+    });
+
+    it('should return user if just backslashes', (done: Done) => {
+        fetch(getbaseURL() + '/api/userID?username=\\\\\\')
+        .then(async res => {
+            if (res.status !== 200) {
+                done("non 200");
+            } else {
+                const data = await res.json();
+                if (data.length !== 1) {
+                    done('Returned incorrect number of users "' + data.length + '"');
+                } else if (data[0].userName !== "\\\\\\") {
+                    done('Returned incorrect username "' + data.userName + '"');
+                } else if (data[0].userID !== getHash("getuserid_user_11")) {
+                    done('Returned incorrect userID "' + data.userID + '"');
+                } else {
+                    done(); // pass
+                }
+            }
+        })
+        .catch(err => ("couldn't call endpoint"));
+    });
+
+    it('should not allow usernames more than 64 characters', (done: Done) => {
+        fetch(getbaseURL() + '/api/userID?username='+'0'.repeat(65))
+        .then(res => {
+            if (res.status !== 400) done('non 400 (' + res.status + ')');
+            else done(); // pass
+        })
+        .catch(err => ("couldn't call endpoint"));
+    });
+
+    it('should not allow usernames less than 3 characters', (done: Done) => {
+        fetch(getbaseURL() + '/api/userID?username=aa')
+        .then(res => {
+            if (res.status !== 400) done('non 400 (' + res.status + ')');
+            else done(); // pass
+        })
+        .catch(err => ("couldn't call endpoint"));
+    });
+
+    it('should allow exact match', (done: Done) => {
+        fetch(getbaseURL() + '/api/userID?username=a&exact=true')
+        .then(async res => {
+            if (res.status !== 200) {
+                done("non 200");
+            } else {
+                const data = await res.json();
+                if (data.length !== 1) {
+                    done('Returned incorrect number of users "' + data.length + '"');
+                } else if (data[0].userName !== "a") {
+                    done('Returned incorrect username "' + data.userName + '"');
+                } else if (data[0].userID !== getHash("getuserid_user_12")) {
+                    done('Returned incorrect userID "' + data.userID + '"');
+                } else {
+                    done(); // pass
+                }
+            }
+        })
+        .catch(err => ("couldn't call endpoint"));
+    });
+
+    it('Should be able to get repeating username with exact username', (done: Done) => {
+        fetch(getbaseURL() + '/api/userID?username=repeating&exact=true')
+        .then(async res => {
+            if (res.status !== 200) {
+                done("non 200");
+            } else {
+                const data = await res.json();
+                if (data.length !== 2) {
+                    done('Returned incorrect number of users "' + data.length + '"');
+                } else if (data[0].userName !== "repeating") {
+                    done('Returned incorrect username "' + data.userName + '"');
+                } else if (data[0].userID !== getHash("getuserid_user_04")) {
+                    done('Returned incorrect userID "' + data.userID + '"');
+                } else if (data[1].userName !== "repeating") {
+                    done('Returned incorrect username "' + data.userName + '"');
+                } else if (data[1].userID !== getHash("getuserid_user_05")) {
+                    done('Returned incorrect userID "' + data.userID + '"');
+                } else {
+                    done(); // pass
+                }
+            }
+        })
+        .catch(err => ("couldn't call endpoint"));
+    });
+
+    it('Should not get exact unless explicitly set to true', (done: Done) => {
+        fetch(getbaseURL() + '/api/userID?username=user&exact=1')
+        .then(async res => {
+            if (res.status !== 200) {
+                done("non 200");
+            } else {
+                const data = await res.json();
+                if (data.length !== 3) {
+                    done('Returned incorrect number of users "' + data.length + '"');
+                } else if (data[0].userName !== "fuzzy user 01") {
+                    done('Returned incorrect username "' + data.userName + '"');
+                } else if (data[0].userID !== getHash("getuserid_user_01")) {
+                    done('Returned incorrect userID "' + data.userID + '"');
+                } else if (data[1].userName !== "fuzzy user 02") {
+                    done('Returned incorrect username "' + data.userName + '"');
+                } else if (data[1].userID !== getHash("getuserid_user_02")) {
+                    done('Returned incorrect userID "' + data.userID + '"');
+                } else if (data[2].userName !== "specific user 03") {
+                    done('Returned incorrect username "' + data.userName + '"');
+                } else if (data[2].userID !== getHash("getuserid_user_03")) {
+                    done('Returned incorrect userID "' + data.userID + '"');
+                } else {
+                    done(); // pass
+                }
+            }
+        })
+        .catch(err => ("couldn't call endpoint"));
+    });
+});