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MCP

Developer Tools MCP Server

Model Context Protocol

Integrate practical developer tools directly into AI clients like Cursor and Claude Desktop via the Model Context Protocol (MCP). No need to switch browsers — perform Base64 encoding, timestamp conversion, JWT parsing, and more right within your AI chat. Fully open source — connect remotely or deploy privately.

Remote endpoint

https://mcp.error.cn

Plug & Play

Supports HTTP/SSE remote connection. Just add the config — no local installation required

Private Deployment

Fully open source — build from source or deploy with Docker

78 Tools

Covers encoding, hashing, format conversion, networking, dev utilities, and more

Quick Start

Connect to the hosted MCP Server via SSE in Cursor. Edit your mcp.json config:

~/.cursor/mcp.json

json

{
  "mcpServers": {
    "next-dev-tools": {
      "url": "https://mcp.error.cn/sse"
    }
  }
}

Tool Categories

78 tools covering common developer operations, all callable via the MCP protocol

Encoding
base64_encode/decode
url_encode/decode
html_entities_encode/decode
text_to_binary
binary_to_text
text_to_nato
text_to_unicode
Hashing & Crypto
hash_text
hmac_generate
bcrypt_hash
bcrypt_verify
encrypt_text
decrypt_text
rsa_key_pair_generate
Generators
uuid_generate
ulid_generate
password_generate
token_generate
lorem_ipsum
otp_generate
bip39_generate
mac_address_generate
random_port
basic_auth_generate
Format Converters
json_format
json_minify
json_diff
json_to_yaml
json_to_xml
json_to_csv
json_to_toml
yaml_to_json
yaml_to_toml
toml_to_json
toml_to_yaml
xml_to_json
xml_format
yaml_view
Unit Converters
timestamp_convert
datetime_convert
temperature_convert
byte_unit_convert
integer_base_convert
color_convert
roman_numeral_convert
percentage_calculate
Parsers
jwt_parse
url_parse
user_agent_parse
phone_parse
iban_validate
email_normalize
Network Tools
ipv4_subnet
ipv4_range_expand
ipv4_address_convert
ipv6_ula_generate
mac_address_lookup
Dev Tools
regex_test
crontab_generate
crontab_next_runs
chmod_calculate
docker_run_to_compose
text_diff
qr_code_generate
Miscellaneous
http_status_info
mime_type_lookup
math_evaluate
word_count
case_convert
slugify
string_obfuscate
eta_calculate
numeronym_generate
password_strength_analyse