Search app files

curl --request POST \
  --url https://app.base44.com/api/apps/{app_id}/sandbox-bridge/grep \
  --header 'Content-Type: application/json' \
  --header 'api_key: <api-key>' \
  --data '
{
  "pattern": "useState",
  "path": "src",
  "glob": "*.jsx",
  "max_results": 50
}
'

import requests

url = "https://app.base44.com/api/apps/{app_id}/sandbox-bridge/grep"

payload = {
    "pattern": "useState",
    "path": "src",
    "glob": "*.jsx",
    "max_results": 50
}
headers = {
    "api_key": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {api_key: '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({pattern: 'useState', path: 'src', glob: '*.jsx', max_results: 50})
};

fetch('https://app.base44.com/api/apps/{app_id}/sandbox-bridge/grep', 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://app.base44.com/api/apps/{app_id}/sandbox-bridge/grep",
  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([
    'pattern' => 'useState',
    'path' => 'src',
    'glob' => '*.jsx',
    'max_results' => 50
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json",
    "api_key: <api-key>"
  ],
]);

$response = curl_exec($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://app.base44.com/api/apps/{app_id}/sandbox-bridge/grep"

	payload := strings.NewReader("{\n  \"pattern\": \"useState\",\n  \"path\": \"src\",\n  \"glob\": \"*.jsx\",\n  \"max_results\": 50\n}")

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

	req.Header.Add("api_key", "<api-key>")
	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://app.base44.com/api/apps/{app_id}/sandbox-bridge/grep")
  .header("api_key", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"pattern\": \"useState\",\n  \"path\": \"src\",\n  \"glob\": \"*.jsx\",\n  \"max_results\": 50\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://app.base44.com/api/apps/{app_id}/sandbox-bridge/grep")

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

request = Net::HTTP::Post.new(url)
request["api_key"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"pattern\": \"useState\",\n  \"path\": \"src\",\n  \"glob\": \"*.jsx\",\n  \"max_results\": 50\n}"

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

{
  "matches": [
    {
      "line": 2,
      "path": "src/pages/Home.jsx",
      "text": "  return <h1>Hello</h1>;"
    }
  ],
  "truncated": false,
  "returned_matches": 1
}

{
  "detail": [
    {
      "loc": [
        "<string>"
      ],
      "msg": "<string>",
      "type": "<string>"
    }
  ]
}

Code and sandbox

Search app files

This API is in beta. Endpoints, fields, and behavior may still change, so avoid depending on it in production.

Searches the app’s files for a pattern and returns the matching lines.

Every sandbox-bridge endpoint runs against the app’s live sandbox, the same filesystem the Base44 builder edits, so a change here is visible in the builder immediately.

The pattern is a regular expression by default; set is_regex: false to match it literally. Narrow the search with path to a subtree and glob to a filename pattern. Matching is case-insensitive unless you set case_sensitive.

Finding nothing is a 200 with an empty matches, not a 404. Results are capped at max_results (200 by default, 1000 at most) and the output at 1 MB, and truncated tells you when either cap bit, so treat a true there as “narrow the search” rather than “no more matches”.

Base44 keeps its own protected trees out of the results, so a pattern that exists only there returns nothing.

This endpoint is limited to 120 requests per minute per app, shared with the other sandbox-bridge endpoints that only read.

The sandbox bridge needs a Builder plan or higher on the app’s workspace, and answers 402 below that. Workspace API keys are not authorized and are rejected with a 403, and it is unavailable for agent apps. A personal API key works as-is. An OAuth access token needs the apps:read scope; the read endpoints don’t require sandbox:write.

Every error response carries a stable extra_data.code alongside the human-readable message. Branch on the code rather than on the message text or the status.

POST

api

apps

{app_id}

sandbox-bridge

grep

Search app files

curl --request POST \
  --url https://app.base44.com/api/apps/{app_id}/sandbox-bridge/grep \
  --header 'Content-Type: application/json' \
  --header 'api_key: <api-key>' \
  --data '
{
  "pattern": "useState",
  "path": "src",
  "glob": "*.jsx",
  "max_results": 50
}
'

import requests

url = "https://app.base44.com/api/apps/{app_id}/sandbox-bridge/grep"

payload = {
    "pattern": "useState",
    "path": "src",
    "glob": "*.jsx",
    "max_results": 50
}
headers = {
    "api_key": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {api_key: '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({pattern: 'useState', path: 'src', glob: '*.jsx', max_results: 50})
};

fetch('https://app.base44.com/api/apps/{app_id}/sandbox-bridge/grep', 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://app.base44.com/api/apps/{app_id}/sandbox-bridge/grep",
  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([
    'pattern' => 'useState',
    'path' => 'src',
    'glob' => '*.jsx',
    'max_results' => 50
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json",
    "api_key: <api-key>"
  ],
]);

$response = curl_exec($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://app.base44.com/api/apps/{app_id}/sandbox-bridge/grep"

	payload := strings.NewReader("{\n  \"pattern\": \"useState\",\n  \"path\": \"src\",\n  \"glob\": \"*.jsx\",\n  \"max_results\": 50\n}")

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

	req.Header.Add("api_key", "<api-key>")
	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://app.base44.com/api/apps/{app_id}/sandbox-bridge/grep")
  .header("api_key", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"pattern\": \"useState\",\n  \"path\": \"src\",\n  \"glob\": \"*.jsx\",\n  \"max_results\": 50\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://app.base44.com/api/apps/{app_id}/sandbox-bridge/grep")

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

request = Net::HTTP::Post.new(url)
request["api_key"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"pattern\": \"useState\",\n  \"path\": \"src\",\n  \"glob\": \"*.jsx\",\n  \"max_results\": 50\n}"

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

{
  "matches": [
    {
      "line": 2,
      "path": "src/pages/Home.jsx",
      "text": "  return <h1>Hello</h1>;"
    }
  ],
  "truncated": false,
  "returned_matches": 1
}

{
  "detail": [
    {
      "loc": [
        "<string>"
      ],
      "msg": "<string>",
      "type": "<string>"
    }
  ]
}

Authorizations

api_key

string

header

required

Personal API key.

Path Parameters

app_id

string

required

ID of the app whose sandbox to operate on.

Body

application/json

pattern

string

required

Search pattern.

path

string | null

Subtree to search, relative to the app root. Default: whole app.

is_regex

boolean

default:true

Treat the pattern as a regex (default) or a literal string.

case_sensitive

boolean

default:false

Case-sensitive match. Default false.

glob

string | null

Optional file glob filter, e.g. "*.tsx".

max_results

integer

default:200

Maximum number of match lines to return.

Required range: 1 <= x <= 1000

Response

The matching lines, empty when nothing matched.

The matches, and whether you got all of them.

matches

GrepMatch · object[]

required

Matching lines, capped at max_results.

Show child attributes

Example:

[
  {
    "line": 2,
    "path": "src/pages/Home.jsx",
    "text": "  return <h1>Hello</h1>;"
  }
]

truncated

boolean

required

true when there was more to return: either more matches than max_results, or output that hit the 1 MB cap. One very long line can set this with few matches.

Example:

false

returned_matches

integer

required

How many entries matches holds.

Example:

1

Base44 APIs

Apps API (Beta)

Monitoring API

Audit Logs API

Search app files

Authorizations

Path Parameters

Body

Response