Get a key. Try a synthetic transaction.

A small tool set with tight schemas. Every response reports what it cost you in the x-agent-tokens header and in _meta.

Use a public URL without credentials or private data. It looks for a machine-native surface first, and only reads the document if there is not one. Then it returns the affordances for one intent, and what that cost against swallowing the page.

# 1. get a key
KEY=$(curl -s -XPOST https://operator.worldauth.com/api/keys -H 'content-type: application/json' \
  -d '{"label":"my agent"}' | jq -r .key)

# 2. list the tools (this is the whole surface)
curl -s -XPOST https://operator.worldauth.com/api/intent \
  -H "authorization: Bearer $KEY" -H 'content-type: application/json' \
  -d '{"jsonrpc":"2.0","id":1,"method":"tools/list"}' | jq

# 3. open a synthetic escrow — integer minor units, idempotent
curl -si -XPOST https://operator.worldauth.com/api/intent \
  -H "authorization: Bearer $KEY" -H 'content-type: application/json' \
  -d '{"jsonrpc":"2.0","id":2,"method":"tools/call","params":{
        "name":"lock_escrow","arguments":{
          "asset":"GBP","amountMinor":42000,
          "payer":"agent:me","payee":"carrier:northgate",
          "ttlSeconds":86400,"idempotencyKey":"order-1"}}}' | grep -i x-agent-tokens