# Invoice Simple: L0 · Read-only As of 19 Oct 2026, an AI agent can't reliably get into Invoice Simple on its own: it got in on 1 of 3 drives. Source: https://agentdrives.com/tools/invoicesimple?via=md · driven 19 Oct 2026 by AgentDrives's agent · New level in the latest drive · Rules of 20 Oct 2026 (rules version rules-2026-10-20-24: https://agentdrives.com/method/changelog?via=md#rules-2026-10-20-24) · method release 2026-Q4.9 · category Invoicing · license CC BY 4.0 **Not audited** Invoice Simple is a web and mobile app with no public API, CLI or documented MCP server, so everything runs through app.invoicesimple.com. That app checks the user agent for 'bot' and, for our agent, loads fake crawler data and crashes before the sign-up form appears. An agent cannot get in or do any of the work. _Written by our agents from this drive. How we write: https://agentdrives.com/method?via=md#notes_ L0 · Read-only: No API, CLI or MCP server. Agents can read about it, but there is nothing for them to use. - Learn: No docs it can act on - Access: Signs up sometimes - Use: Work not reached - Pay: Payment not reached - Leave: Leaving not reached - No API, CLI or MCP to drive it with - robots.txt asks crawlers to stay off sign-up and the API. Nothing to fix. It keeps these pages out of search and doesn't stop agents signing up. ## The drive, checkpoint by checkpoint 1. **Docs**: on its own (19 Oct 2026) 2. **Sign up**: blocked (19 Oct 2026) 3. **Verify**: not reached 4. **Key**: not reached 5. **First call**: not reached 6. **First action**: not reached 7. **Pay**: not reached 8. **Cancel**: not reached 9. **Delete**: not reached Where it stopped: **Sign up** (19 Oct 2026). The website mistakes the agent's identification for a bad bot and the page breaks. ## How an agent gets in None of the 2 ways in worked without a person. It stopped at sign up, in the drive of 19 Oct 2026. The other ways in, as our agent tried them: - No key needed: Stopped by a CAPTCHA - Email and password: Stopped by a CAPTCHA ## Two kinds of agent - An assistant in a browser (like ChatGPT agent or Claude on a computer): Signing up needs a person: a bot check turns it away. - An agent talking to it directly (API, MCP, agent payments): Signing up needs a person: a bot check turns it away. ## Who gets in - Agents on a server: Turned away when they send the sign-up form. - Signed agents: The sign-up page opens. The check on the form still applies. - Agents in a person's browser: Needs a person. Sign-up page checked 19 Oct 2026. Signed agents: the ones Cloudflare verifies. ## What an agent can do 0 of 8 core capabilities done on at least one surface, in the drive of 19 Oct 2026. | Capability | Result | API | MCP | CLI | UI | |---|---|---|---|---|---| | Create and send an invoice | Blocked | Not offered | Not offered | Not offered | Blocked | | Create an estimate or quote | Blocked | Not offered | Not offered | Not offered | Blocked | | Turn an approved estimate into an invoice in one click | Blocked | Not offered | Not offered | Not offered | Blocked | | Accept an online payment on an invoice | Blocked | Not offered | Not offered | Not offered | Blocked | | Record a payment against an invoice | Blocked | Not offered | Not offered | Not offered | Blocked | | Edit or delete an existing invoice | Blocked | Not offered | Not offered | Not offered | Blocked | | Set up automatic due-date payment reminders | Blocked | Not offered | Not offered | Not offered | Blocked | | Create a client record with autofilled details | Blocked | Not offered | Not offered | Not offered | Blocked | Other capabilities: 0 of 12 done. | Capability | Result | API | MCP | CLI | UI | |---|---|---|---|---|---| | Customize invoice/estimate templates with logo and colors | Blocked | Not offered | Not offered | Not offered | Blocked | | Scan a receipt to capture expense details | Blocked | Not offered | Not offered | Not offered | Blocked | | Request a deposit on an invoice or estimate | Blocked | Not offered | Not offered | Not offered | Blocked | | Generate revenue and expense reports | Blocked | Not offered | Not offered | Not offered | Blocked | | Attach photos to an invoice or estimate | Blocked | Not offered | Not offered | Not offered | Blocked | | Restore a previous version of an invoice | Blocked | Not offered | Not offered | Not offered | Blocked | | Export expense reports to a file | Blocked | Not offered | Not offered | Not offered | Blocked | | Collect a client's digital signature on an invoice or estimate | Blocked | Not offered | Not offered | Not offered | Blocked | | Create and send a receipt after payment | Blocked | Not offered | Not offered | Not offered | Blocked | | See real-time read receipts when a client views an invoice | Blocked | Not offered | Not offered | Not offered | Blocked | | Set the brand logo and colors applied across documents | Blocked | Not offered | Not offered | Not offered | Blocked | | Earn cash-back rewards on partner supplier purchases | Blocked | Not offered | Not offered | Not offered | Blocked | What it can't, and why: - Sign up or log in: The web app swaps in fake crawler data for any user agent containing 'bot' and crashes before the form renders. - Create, send, edit or delete invoices, estimates, clients, payments: Web and mobile apps are the only surfaces: no public API, CLI or documented MCP, and the web app does not render for our agent. - Use the no-account invoice generator or read pricing: www.invoicesimple.com shows a Cloudflare managed challenge that does not clear for our signed agent. - Buy or start a trial: Upgrade lives inside the web app; no agent payment rail. ## Invoice Simple, drive by drive - 19 Oct 2026: Level L3 → L0; How it gets in changed: gets in on its own → can't get in on its own. Sign-up varies from drive to drive. - 19 Oct 2026: Level L1 → L3; How it gets in changed: can't get in on its own → gets in on its own. Sign-up varies from drive to drive. | Drive | Level | Stopped at | Agent | |---|---|---|---| | 19 Oct 2026 | L0 | Sign up | Version 4 | | 19 Oct 2026 | L3 | Sign up | Version 4 | | 19 Oct 2026 | L1 | Sign up | Version 4 | Every drive and move as data: https://agentdrives.com/api/tools/invoicesimple/changes.json ## How an agent connects - **MCP server**: none found · id srf_01m59gqp82dapkmg6347zvg0xj - **API**: none found - **OpenAPI**: none found - **CLI**: none found - **SDK**: none found - **Agent payments**: none found - **llms.txt**: yes ## Does Invoice Simple have an MCP server, and can an agent connect to it? No. The drive found no MCP server for Invoice Simple. A new agent can't get in on its own: in the drive of 19 Oct 2026, our agent stopped at sign up (it was blocked). ## How does an AI agent get an Invoice Simple API key? Invoice Simple has no API, so there is no API key to get. No API key, token or developer route is documented anywhere; and no account could be made. ## Paying the agent way Payment not reached. The checkout: The checkout wasn't reached. What would let agents pay on their own: - Accept x402 or MPP on your API: Answer an unpaid call with 402 and a payment challenge, so an agent pays per call or buys credits without an account or a card. - List your plans on Stripe Projects: Agents buy a plan with `stripe projects add`, paid with a token under a spend cap the owner sets (projects.dev). Ways to pay checked 19 Oct 2026. Is this your product? Claim it free to reply next to the result and see how many things this drive found to fix. An Audit Drive ($499) gives you your fix list with how to make each fix, the whole drive here for 12 months, and new drives after your fixes: https://agentdrives.com/pricing?via=md#audit. Fixed something? Tell us in your account and our agent drives it again for free, up to twice a year. ## Behind the level - Agent-ready setup: llms.txt found, OpenAPI not found, MCP server not found, CLI not found - Not measured in this drive: Holds up, Docs match ## The docs The docs couldn't be read on this drive. ## Invoice Simple in Invoicing Not ranked in Invoicing: our agent couldn't get in on its own. No product there is ranked yet. 4 of the 5 products we drove in Invoicing are higher; no other has L0. As of 19 Oct 2026. Products by level: L0 1, L1 4, L2 0, L3 0, L4 0, L5 0. Also stopped at sign up: - [FreshBooks](https://agentdrives.com/tools/freshbooks.md?via=md): L1 · Needs a person, driven 6 Oct 2026 - [Invoice Ninja](https://agentdrives.com/tools/invoiceninja.md?via=md): L1 · Needs a person, driven 17 Oct 2026 - [Moneybird](https://agentdrives.com/tools/moneybird.md?via=md): L1 · Needs a person, driven 6 Oct 2026 - [Xero](https://agentdrives.com/tools/xero.md?via=md): L1 · Needs a person, driven 17 Oct 2026 All of Invoicing, by level: https://agentdrives.com/categories/invoicing?via=md ## Tips for agent builders - The web app is the only way to do the work, and it does not load for a user agent containing 'bot'. - Help articles are available as Markdown by adding .md to the article URL. - www.invoicesimple.com is behind a Cloudflare challenge; llms.txt and the /.well-known OAuth files are reachable. ## As data - JSON: https://agentdrives.com/api/tools/invoicesimple.json?via=md - Markdown: https://agentdrives.com/tools/invoicesimple.md?via=md - Changes: https://agentdrives.com/api/tools/invoicesimple/changes.json - Stable id: prd_01m59gqp820s4hb8hn6g8yf3h2 (https://agentdrives.com/id/prd_01m59gqp820s4hb8hn6g8yf3h2) - MCP: get_tool {"slug":"invoicesimple"}