TTL - Upstash Documentation

Use TTL to read how much longer a key will live, in seconds.

The reply is -1 when the key exists but has no expiration and -2 when the key does not exist, so these two are never confused with a real remaining lifetime. Values are rounded to whole seconds; use PTTL for millisecond precision and EXPIRETIME when you want the absolute deadline rather than the time left.

Syntax#

TTL <key>

Arguments#

Argument	Required	Repeatable	Description
`<key>`	Yes	No	Redis key targeted by the command.

Important points#

Negative integer replies are sentinel values, not durations or timestamps; see the response description for missing or persistent data.

Response#

The reply reports the result of the operation. Error replies have the same shape in RESP2 and RESP3 and are surfaced as exceptions by the SDKs below.

Protocol	Reply
RESP2	Integer: remaining lifetime in seconds, `-1` if the key has no expiration, `-2` if the key does not exist
RESP3	Integer: remaining lifetime in seconds, `-1` if the key has no expiration, `-2` if the key does not exist

Note

Client libraries often decode bulk strings, maps, sets, and numeric strings into language-native values. The table describes the Redis wire reply.

Examples#

TCP examples use the TLS REDIS_URL from the Upstash console. REST examples use UPSTASH_REDIS_REST_URL and UPSTASH_REDIS_REST_TOKEN.

Redis CLI

TTL my-key

@upstash/redis

import { Redis } from "@upstash/redis";const redis = Redis.fromEnv();const seconds = await redis.ttl(key);

upstash_redis

from upstash_redis import Redisredis = Redis.from_env()result = redis.ttl("my-key")print(result)

ioredis

import Redis from "ioredis";const redis = new Redis(process.env.REDIS_URL!);const result = await redis.ttl("my-key");console.log(result);

node-redis

import { createClient } from "redis";const client = await createClient({ url: process.env.REDIS_URL })  .on("error", console.error)  .connect();const result = await client.ttl("my-key");console.log(result);

redis-py

import osimport redisclient = redis.from_url(os.environ["REDIS_URL"])result = client.ttl("my-key")print(result)

go-redis

package mainimport (    "context"    "fmt"    "os"    "github.com/redis/go-redis/v9")func main() {    opts, err := redis.ParseURL(os.Getenv("REDIS_URL"))    if err != nil {        panic(err)    }    client := redis.NewClient(opts)    result, err := client.TTL(context.Background(), "my-key").Result()    if err != nil {        panic(err)    }    fmt.Println(result)}

jedis

import java.net.URI;import redis.clients.jedis.Jedis;try (Jedis jedis = new Jedis(new URI(System.getenv("REDIS_URL")))) {  Object result = jedis.ttl("my-key");  System.out.println(result);}

redis-rs

use redis::TypedCommands;fn main() -> redis::RedisResult<()> {    let url = std::env::var("REDIS_URL").expect("REDIS_URL is not set");    let client = redis::Client::open(url)?;    let mut connection = client.get_connection()?;    let result = connection.ttl("my-key")?;    println!("{result:?}");    Ok(())}