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Anthropic connector

Connect an Anthropic Admin API key so Meridian can pull Claude spend and usage for attribution and close.

AvailableMethod: API

Overview

Connect an Anthropic Admin API key so Meridian can pull Claude spend and usage for attribution and close.

Data pulled

  • Daily cost by model from the Admin cost report; charges without a model, such as web search, are kept under their cost type
  • Token counts are not provided by this path (recorded as zero)
  • Persisted as source_type=api_sync

What gets attributed

Meridian reads the Anthropic Admin cost report and stores one row per day per model; charges without a model, such as web search, are kept under their cost type. Workspace splitting is off until you ask for it.

Until a workspace is mapped, its spend arrives unattributed in the attribution inbox (Agents & allocation → Unattributed), where you can assign it or create a rule that matches on vendor or model.

Attributing spend by workspace or project

Workspace splitting is available on request. Contact support@onaro.io. We enable it with you and confirm your first month's split together. Dates before that cutover stay as a daily total.

Authentication & credential storage

Meridian stores the following fields for this connector (values encrypted at rest):

  • api_key
  • Credentials are encrypted with AES-256-GCM using a KMS-wrapped data encryption key (DEK) and stored in vendor_connections.credentials_encrypted.
  • Meridian never returns the plaintext key after save. Revocation is disconnect: deactivate or delete the vendor connection — sync stops and the encrypted blob is no longer used.
  • Requires an Admin API key (keys that include admin in the identifier). A standard inference key validates but cannot retrieve billing.

Sync schedule & behavior

Provider Admin APIs return daily buckets. Syncs automatically every 6 hours; manual sync anytime. There is no per-connection frequency setting.

Setup steps

  1. Create an Admin API key in the Anthropic console.
  2. In Meridian → Vendors, select Anthropic, paste the admin key, and label the connection.
  3. Run or wait for sync and verify spend_records.

Troubleshooting

  • 403 on sync: replace a regular API key with an Admin key.
  • 401: regenerate the admin key and reconnect.

Related

Onaro Meridian is FinOps for agentic AI: the system of record that attributes, controls and books what AI agents spend.