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Neutrino for AI agents

Neutrino API provides general-purpose utilities for data validation, geolocation, and security checks used across applications that need fast, reliable lookups. Connect it once through Arc0, and your agent, or Claude, ChatGPT and Cursor, can use it through one MCP endpoint, limited to what each user approved.

Connect NeutrinoSee the 24 actions ↓
Developer toolsAPI keyMCP + RESTneutrinoapi.com
AUDIT LOG · NEUTRINOPOLICY: acme-support
09:41:07 · claude · u_8f2read
neutrino.convert
Convert Value✓ allowed · 212ms
09:41:08 · claude · u_8f2read
neutrino.lookup_domain
Domain Lookup✓ allowed · 164ms
09:41:09 · claude · u_8f2write
neutrino.add_watermark_to_image
Add Watermark to Image✓ approved · approved by user
EVERY NEUTRINO CALL, ON THE RECORD
01 · USE CASES

What agents do in Neutrino.

01

Validate a phone number

Check a submitted phone number's validity and carrier before saving it to a record.

02

Geocode an address

Convert a street address into map coordinates for a location feature, a read-only geocoding lookup.

03

Check an IP's reputation

Look up an IP address against blocklists before allowing a risky signup.

02 · ACTIONS

24 Neutrino actions, graded by risk.

Every Neutrino action is tagged read, write or destructive, so one policy covers the whole app and new actions inherit the right default.

read

4

Look things up. Allowed by default.

  • neutrino.convert
    Convert Value
  • neutrino.lookup_domain
    Domain Lookup
  • neutrino.check_ip_blocklist
    IP Blocklist
  • neutrino.verify_security_code
    Verify Security Code

write

20

Create and change things. Allow, or ask the user first.

  • neutrino.add_watermark_to_image
    Add Watermark to Image
  • neutrino.ip_info
    IP Info
  • neutrino.qr_code
    QR Code
  • neutrino.ip_probe
    IP Probe
  • neutrino.url_info
    URL Info
  • neutrino.ua_lookup
    UA Lookup
  • neutrino.bin_lookup
    BIN Lookup
  • neutrino.hlr_lookup
    HLR Lookup
  • neutrino.html_clean
    HTML Clean
  • neutrino.sms_verify
    SMS Verify
  • neutrino.html_render
    HTML Render
  • neutrino.email_verify
    Verify Email Address
  • neutrino.image_resize
    Resize Image
  • neutrino.email_validate
    Validate and analyze an email address
  • neutrino.phone_validate
    Phone Validate
  • neutrino.bad_word_filter
    Bad Word Filter
+ 4 MORE

destructive

0

Delete, cancel or archive. Ask first, or deny outright.

  • No destructive actions.
03 · HOW IT WORKS

Neutrino in three steps.

  1. 01Your users connect NeutrinoThey add their Neutrino api key on Arc0 Connect, under your brand. It goes straight into the vault.
  2. 02You set the rulesReads run, and writes like “add Watermark to Image” can wait for the user to approve.
  3. 03Any agent can actYour agent calls Neutrino through the Arc0 SDK or MCP, and so can Claude, ChatGPT and Cursor. Every call lands on the audit log.
POLICY.TS
await arc0.policies.set('neutrino', {
  read: 'allow',
  write: 'ask',        // add_watermark_to_image
  destructive: 'deny',  
})

# Claude Code: the same connection, one URL
$ claude mcp add --transport http arc0 \
    https://mcp.arc0.ai/u/u_8f2
04 · AUTH AND DATA

How Neutrino connects.

Users add their Neutrino api key on Arc0 Connect. It is encrypted in the vault, never shown to the model, and each user can rotate or revoke it at any time.

The same Neutrino connection serves your agent over MCP and your own backend over REST and the proxy, so a user connects once. How Arc0 handles credentials →

AUTH
API key
CREDENTIALS
Per-tenant encrypted vault
MODEL SEES
Results only, never credentials
AUDIT LOG
Every call, on every plan
05 · WORKS WITH

Use Neutrino from any agent.

Claude
ChatGPT
Cursor
Codex
VS Code
OpenAI Agents SDK
Claude Agent SDK
Vercel AI SDK
Mastra
LangGraph
06 · RELATED

More developer tools apps.

GitHub896 actionsSupabase129 actions0CodeKit8 actionsAbly25 actionsAbstract3 actionsAddressfinder17 actionsAddresszen2 actionsAlchemy36 actions
ALL DEVELOPER TOOLS APPS →
07 · FAQ

Neutrino and Arc0, answered.

Q01

Can I use Neutrino with Claude, ChatGPT or Cursor?

Yes. Connect Neutrino to Arc0 once, then add your Arc0 MCP URL to Claude, ChatGPT, Cursor, Claude Code or any other remote-MCP client. Each assistant only gets the Neutrino actions you allow.

Q02

How do users connect Neutrino?

Users add their Neutrino api key on Arc0 Connect. It is encrypted in the vault, never shown to the model, and each user can rotate or revoke it at any time.

Q03

Which Neutrino actions can my agent take?

24 in total: 4 read, 20 write and 0 destructive, such as “add Watermark to Image”. Your policies decide which of them each agent may call.

Q04

Can I make my agent read-only in Neutrino?

Yes. Allow read actions and deny writes in the Neutrino policy. Your agent can still look things up, and any write it attempts is blocked and logged.

Q05

Can my own backend call Neutrino too?

Yes. The same Neutrino connection is available over REST and through the Arc0 proxy, so your product and your agent share one connection per user.

Get started

Plug Neutrino into your agent.

Your users connect Neutrino once, under your brand. Your agent gets 24 actions behind your policies, with every call on the record.

Connect NeutrinoBrowse all apps →

Free to build · MCP + REST · Audit log on every plan