Your agent checks the details before it sends, saves or pays.

One bad detail turns into a bounced welcome email, a wrong record or a failed payment. Your agent checks each one first and asks again only when something is off.

Open Email Validation What one run costs

Calls4 tools
One run€0.04
RoutesAPI, MCP, SDKs and x402

How your agent does it

4 calls, one connection

A new business customer fills in a sign-up form, and the agent creates their account.

Every step goes through the same key and the same connection, with no account at any of the providers behind them.

Step 1: Email Validation Free

Checks the address can receive mail: syntax, mail server, disposable and role addresses.

Free to try x402 email-validate
Step 2: Phone Validation €0.02

Checks the phone number and returns it in international format, with its country and type.

x402 phone-validate
Step 3: IBAN Validation Free

Checks the IBAN format and checksum, and reads the country and bank code from it.

Free to try x402 iban-validate
Step 4: EU VAT Validation €0.02

Checks the EU VAT number against the EU’s VIES service and returns the registered name.

x402 vat-validate
The result

The agent saves the details that check out and asks the customer again for the one that does not: an email address whose domain has no mail server, most likely a typo.

Illustrative example

One run, start to finish

What the agent sends and what comes back, step by step.

1 Email Validation

Agent sends

{
  "email": "[email protected]"
}

Comes back

{
  "email": "[email protected]",
  "valid": false,
  "domain": "gmail.con",
  "has_mx_records": false,
  "is_disposable": false
}

2 Phone Validation

Agent sends

{
  "phone_number": "+46701740605"
}

Comes back

{
  "valid": true,
  "e164": "+46701740605",
  "country_code": "SE",
  "phone_type": "mobile"
}

3 IBAN Validation

Agent sends

{
  "iban": "SE4550000000058398257466"
}

Comes back

{
  "valid": true,
  "country_code": "SE",
  "bank_code": "500"
}

4 EU VAT Validation

Agent sends

{
  "vat_number": "SE556703748501"
}

Comes back

{
  "valid": true,
  "vat_number": "SE556703748501",
  "company_name": "Spotify AB",
  "country_code": "SE"
}

What one run costs

Priced per call from the live catalogue, with no subscription and no provider accounts.

One run, with an API key €0.04

Free tools cost nothing when called with a key. Each tool is charged only when its call succeeds.

No account at all

Pay per request from a wallet

Every step of this run is eligible for x402. Your agent pays each request in USDC as it goes: $0.1296 for the run, quoted before anything is paid.

The calls, in code

Each step through the REST API, with one key and the example’s inputs. Your agent passes what one step returns into the next.

The same tools work over MCP and the SDKs, and keyless over x402. Each tool’s page has the call for every route.

Read the docs

# Free tool: works without a key, within a monthly allowance. Add your key for more.
curl -X POST https://api.strale.io/v1/do \
  -H 'Content-Type: application/json' \
  -d '{
    "capability_slug": "email-validate",
    "inputs": {
      "email": "[email protected]"
    },
    "max_price_cents": 3
  }'

# Needs an API key. max_price_cents caps what this call may cost.
curl -X POST https://api.strale.io/v1/do \
  -H "Authorization: Bearer $STRALE_API_KEY" \
  -H 'Content-Type: application/json' \
  -d '{
    "capability_slug": "phone-validate",
    "inputs": {
      "phone_number": "+46701740605"
    },
    "max_price_cents": 2
  }'

# Free tool: works without a key, within a monthly allowance. Add your key for more.
curl -X POST https://api.strale.io/v1/do \
  -H 'Content-Type: application/json' \
  -d '{
    "capability_slug": "iban-validate",
    "inputs": {
      "iban": "SE4550000000058398257466"
    },
    "max_price_cents": 5
  }'

# Needs an API key. max_price_cents caps what this call may cost.
curl -X POST https://api.strale.io/v1/do \
  -H "Authorization: Bearer $STRALE_API_KEY" \
  -H 'Content-Type: application/json' \
  -d '{
    "capability_slug": "vat-validate",
    "inputs": {
      "vat_number": "SE556703748501"
    },
    "max_price_cents": 2
  }'

More jobs agents do with Strale

Or search all 298 tools in the catalogue.

Give your agent this job today

Start with Email Validation, then add the next step through the same connection.

Open Email Validation Get an API key