Skip to content
actionlake
Start free

Connectors · MSP & PSA

Backblaze B2 MCP server for AI agents.

actionlake is an MCP gateway: one remote MCP server that connects Claude and other MCP clients to Backblaze B2 and the rest of your systems. It gives your agent 26 Backblaze B2 actions (10 reads, 12 writes and 4 that wait for a confirmation) and holds the Backblaze B2 credential itself, so the agent never does. It paces Backblaze B2's limits and records every call.

Connect Backblaze B2 freeSee pricing

100,000 free calls a month. No card, no email, no password: press Start a free sandbox on the next screen and keep the key it shows you.

claude mcp add --transport http actionlake https://connect.actionlake.com/mcp
the first call
do {  action: "backblaze_b2.buckets.list",  intent: "check which Backblaze B2 account is connected"}# List buckets · read · 1 upstream call
  • 26actionsin one signed file
  • 10readlook, never change
  • 12writecreate and update
  • 4wait for a yesdestructive, confirmed first

Set up

Connect Backblaze B2 in three steps.

  1. 01

    Add actionlake to Claude.

    Run the command once in Claude Code; its consent page can create a free sandbox: 100,000 calls a month, no card. In the Claude app, add a custom connector with the URL below and paste your key on the consent page. Creating a new sandbox from the Claude app is not yet tested by us.

    https://connect.actionlake.com/mcp
  2. 02

    Connect Backblaze B2.

    Session login. actionlake opens the session and renews it when it expires. actionlake stores what you paste write-only, sealed under your tenant's key.

    • application_key_idBackblaze application key ID (keyID)
    • application_keyBackblaze application key (shown once when the key is created). actionlake exchanges the key pair at…
    • account_idYour Backblaze B2 account id
    • hostWhere your Backblaze B2 lives: your host
    account { op: "connections.requirements", service: "backblaze_b2" }
# free: exactly what to paste, and what is found for you
  3. 03

    Make the first call. Check before a write.

    Ask in plain words; Claude picks the action. Before anything changes, check validates the call and prices it, for free.

    do    { action: "backblaze_b2.buckets.list" }# list buckets · read · 1 upstream callcheck { action: "backblaze_b2.files.copy", input: { … } }# free: inputs, permissions, cost and confirmations, nothing sent

Backblaze B2 at a glance

Sign-in
Session login. actionlake opens the session and renews it when it expires.
You provide
application_key_idapplication_key
Setup fields
account_idhost
Limits we pace to
100 calls a second, per connection
API covered
B2 Native API v4, at your Backblaze B2 instance's API base URL, which you enter when connecting (path /b2api/v4)
Built from
Backblaze B2's documentation, read 23 October 2026backblaze.com
Service file
Version 1.0.0, signed (Ed25519)
Cached reads
8 of 10 reads, for up to 5 minutes; a write clears what it affects
Shared entities
1, so ask can line Backblaze B2 up with your other systems
Data
Processed and stored in Sydney, Australia. No US region yet

Capabilities

What an AI agent can do in Backblaze B2.

26 actions in 9 areas. Every one carries its effect, so a key can allow the reads and hold the rest.

  • 10readlook, never change
  • 12writecreate and update
  • 4destructivewait for a confirmation

  1. Files

    8

    3 read · 4 write · 1 destructive

    List file names in a bucket · Copy a file (server-side) · List file versions in a bucket · Get a file's information

  2. Buckets

    4

    1 read · 2 write · 1 destructive

    Create a bucket · List buckets · Update a bucket · Delete a bucket

  3. Large files

    4

    1 read · 2 write · 1 destructive

    List unfinished large files · Start a large file upload · Finish a large file upload · Cancel an unfinished large file

  4. Keys

    3

    1 read · 1 write · 1 destructive

    Create an application key · List application keys · Delete an application key

  5. Bucket notification rules

    2

    1 read · 1 write · 0 destructive

    Get a bucket's event notification rules · Set a bucket's event notification rules

  6. Large file parts

    2

    1 read · 1 write · 0 destructive

    Copy a part into a large file (server-side) · List a large file's parts

  7. Download authorizations

    1

    0 read · 1 write · 0 destructive

    Create a download authorization token for a file-name prefix

  8. Upload part urls

    1

    1 read · 0 write · 0 destructive

    Get an upload URL and token for a large file's parts

1 more area · 1 actions
  • Upload urls 1

Top actions

The Backblaze B2 API, shaped for agents.

The ids your agent types, what each does, and the one name it shares with other systems.

ActionWhat it doesEffectSame name in
backblaze_b2.files.listList file names in a bucketList file names in a bucket.readthis connector
backblaze_b2.keys.listList application keysList application keys.readthis connector
backblaze_b2.files.copyCopy a file (server-side)Copy a file (server-side).writethis connector
backblaze_b2.keys.createCreate an application keyCreate an application key.writethis connector
backblaze_b2.buckets.listList bucketsList buckets.readthis connector
backblaze_b2.buckets.createCreate a bucketCreate a bucket.writethis connector
backblaze_b2.large_files.startStart a large file uploadStart a large file upload.writethis connector
backblaze_b2.large_file_parts.copyCopy a part into a large file (server-side)Copy a part into a large file (server-side).writethis connector
backblaze_b2.large_file_parts.listList a large file's partsList a large file's parts.readthis connector
backblaze_b2.large_files.list_unfinishedList unfinished large filesList unfinished large files.readthis connector
backblaze_b2.download_authorizations.createCreate a download authorization token for a file-name prefixCreate a download authorization token for a file-name prefix.writethis connector
backblaze_b2.keys.deleteDelete an application keyDelete an application key.destructivethis connector

Try it

Prompts to paste into Claude.

Each one names the Backblaze B2 actions it will call, so you know what it reads and what it changes before you send it.

  1. Readread

    Which Backblaze B2 files changed this week, and who changed them?

    callsbackblaze_b2.files.list

  2. Writewrite

    Copy a file (server-side) in Backblaze B2. Show me exactly what you will send before you save it.

    callsbackblaze_b2.files.copy

Governance for Backblaze B2

Destructive actions wait for a yes.

4 Backblaze B2 actions are destructive. These are all of them:

  • Delete an application keybackblaze_b2.keys.delete
  • Delete a bucketbackblaze_b2.buckets.delete
  • Delete a file versionbackblaze_b2.files.delete_version
  • Cancel an unfinished large filebackblaze_b2.large_files.cancel

A destructive action runs only with confirm: true. Under the human policy the agent cannot confirm for itself: the run stops until a named person approves, in the console or from a signed link in an email. The cap on a key is refused before the call is sent, never after.

dobackblaze_b2.keys.deleteconfirm_policy: human

Delete an application key?

intent: the user asked me to delete an application key

run suspended · waiting for a named person · key backblaze-b2-agent cannot confirm itself
In the console, or from an emailed signed link.
a key for this connector
account {  op: "keys.create", name: "backblaze-b2-agent",  allowed_actions: ["backblaze_b2.*"], cap_calls: 2000,  confirm_policy: "human_for_writes",  approval_rules: [    { match: "backblaze_b2.keys.delete", approver: "[email protected]" },    { match: "backblaze_b2.buckets.delete", approver: "[email protected]" },    { match: "backblaze_b2.files.delete_version", approver: "[email protected]" }  ]}
Illustrative. Scoped to Backblaze B2 only, capped at 2,000 upstream calls, every write confirmed, and the destructive ones approved by a named person.

Cost

What Backblaze B2 costs on actionlake.

Every Backblaze B2 action is one upstream call, the only thing actionlake bills. Searching, check, cost, account and any call Backblaze B2 refused with 401, 403, 429 or a 5xx are free. Paid plans start at US$49 a month for 250,000 calls, with overage from US$0.30 down to US$0.18 per 1,000.

  • 1upstream call per actionall 26 Backblaze B2 actions
  • 26actions pageeach page of a long list is one call
  • 8reads can be cacheda cache hit costs nothing
  • 100,000calls a month, freepaid plans from US$49 a month for 250,000

See pricing

Action index

Every Backblaze B2 action.

26 actions by area: the id your agent calls, what it does, and its effect.

Files8
  • backblaze_b2.files.copyCopy a file (server-side)write
  • backblaze_b2.files.delete_versionDelete a file versiondestructive
  • backblaze_b2.files.getGet a file's informationread
  • backblaze_b2.files.hideHide a file (create a hide marker)write
  • backblaze_b2.files.listList file names in a bucketread
  • backblaze_b2.files.list_versionsList file versions in a bucketread
  • backblaze_b2.files.update_legal_holdUpdate a file's legal holdwrite
  • backblaze_b2.files.update_retentionUpdate a file's retention (Object Lock)write
Buckets4
  • backblaze_b2.buckets.createCreate a bucketwrite
  • backblaze_b2.buckets.deleteDelete a bucketdestructive
  • backblaze_b2.buckets.listList bucketsread
  • backblaze_b2.buckets.updateUpdate a bucketwrite
Large files4
  • backblaze_b2.large_files.cancelCancel an unfinished large filedestructive
  • backblaze_b2.large_files.finishFinish a large file uploadwrite
  • backblaze_b2.large_files.list_unfinishedList unfinished large filesread
  • backblaze_b2.large_files.startStart a large file uploadwrite
Keys3
  • backblaze_b2.keys.createCreate an application keywrite
  • backblaze_b2.keys.deleteDelete an application keydestructive
  • backblaze_b2.keys.listList application keysread
Bucket notification rules2
  • backblaze_b2.bucket_notification_rules.getGet a bucket's event notification rulesread
  • backblaze_b2.bucket_notification_rules.setSet a bucket's event notification ruleswrite
Large file parts2
  • backblaze_b2.large_file_parts.copyCopy a part into a large file (server-side)write
  • backblaze_b2.large_file_parts.listList a large file's partsread
Download authorizations1
  • backblaze_b2.download_authorizations.createCreate a download authorization token for a file-name prefixwrite
Upload part urls1
  • backblaze_b2.upload_part_urls.getGet an upload URL and token for a large file's partsread
Upload urls1
  • backblaze_b2.upload_urls.getGet an upload URL and token for a bucketread

Questions

The Backblaze B2 MCP server, answered.

Is there a Backblaze B2 MCP server for Claude?

Yes. actionlake is an MCP gateway: a remote MCP server that gives Claude, or another MCP client, 26 Backblaze B2 actions across files, buckets, large files and keys, through the same eight tools it uses for every other connector. actionlake is independent; it is not made or endorsed by Backblaze B2.

What do I need to connect Backblaze B2?

Backblaze application key ID (keyID) and Backblaze application key (shown once when the key is created). actionlake exchanges the key pair at…. Plus your account id and your host. The free call account { op: "connections.requirements", service: "backblaze_b2" } lists exactly what to paste.

Can an AI agent delete or change things in Backblaze B2?

Only if its key allows it, and only with an explicit confirmation. 4 Backblaze B2 actions are destructive, including delete an application key, delete a bucket and delete a file version. Each runs only with confirm: true. Under the human confirm policy, or an approval rule on the key, the run waits until a named person approves it.

Will an AI agent use up my Backblaze B2 API limit?

actionlake paces every call to the limits in the Backblaze B2 service file: 100 calls a second per connection. Repeated reads are answered from cache (8 Backblaze B2 actions can be), which never reaches Backblaze B2.

What does a Backblaze B2 action cost?

One upstream call, the only unit actionlake bills. A list that pages bills one call per page (26 Backblaze B2 actions page). Cache hits, searches, dry runs and calls Backblaze B2 refused with 401, 403, 429 or a 5xx are free. The Free plan includes 100,000 calls a month with no card. Paid plans start at US$49 a month for 250,000 calls, with overage from US$0.30 down to US$0.18 per 1,000.

Which Backblaze B2 API does it cover?

The B2 Native API v4 at your Backblaze B2 instance's API base URL, which you enter when connecting (path /b2api/v4). It is built from Backblaze B2's documentation as read on 23 October 2026. 26 actions in 9 areas, each one in the signed service file (version 1.0.0).

Does actionlake keep my Backblaze B2 data, and where?

actionlake processes and stores data in Sydney, Australia; there is no US region yet. Reads may be cached for up to 5 minutes, and a write clears the reads it affects. Each run's request and response is kept, sealed, for your plan's trace window: 1 day on Free, 3 days on Starter, 7 days on Pro, 14 days on Team, 30 days on Business and 30 days on Enterprise. Your Backblaze B2 credential is sealed under your tenant's key, never logged and never returned. Your traffic is not used to train models.

Which AI clients can use it?

Claude Code, tested by us end to end, and the Claude app as a custom connector, tested by us with an existing key. Other MCP clients that support remote servers over Streamable HTTP (MCP revisions 2025-06-18 and 2025-11-25) and OAuth dynamic client registration, or a bearer header, should connect the same way; we have not tested them. Or plain REST, under the same action names.

More connectors like Backblaze B2

Joins with, on shared entities

Browse

actionlake is independent. It is not made or endorsed by Backblaze B2; the name is the vendor's own. Counts are from the Backblaze B2 service file, version 1.0.0.

Give your agent Backblaze B2 today.

Connect Backblaze B2 freeSee pricing

Start free - 100,000 calls/month, no card. No signup. Hard caps on every key. Cached answers are free.