Alegra API
★ Only Publicly Available OpenAPI DocumentFinanceAccountingbasic33 EndpointsREST
For Agents
Create and manage invoices, items, contacts, estimates, and payments inside an Alegra accounting account through 33 REST endpoints.
Use for: I need to create a new invoice in Alegra for a customer, Email an Alegra invoice to a contact, List all unpaid invoices for a given contact, Record a payment against an Alegra invoice
Not supported: Does not handle payment processing, payroll, or tax filing — use for invoicing, contacts, items, payments, and credit note bookkeeping inside Alegra only.
Jentic publishes the only available OpenAPI specification for Alegra API, keeping it validated and agent-ready. Alegra is an accounting and invoicing platform widely used by SMBs across Latin America and Spain. The REST API exposes invoices, items, contacts (customers and suppliers), payments, estimates, credit notes, bank accounts, and chart-of-accounts categories. Authentication uses HTTP basic auth with the user's Alegra email and an API token from the Alegra account.
Install Jentic One Beta
Connect the Alegra API to your agent
Jentic One is a self-hosted execution layer for AI agents. It lets your agent call the Alegra API, or any other public or private API you need. You set the rules, the agent never sees your credentials, and every call is logged.
Two steps, two machines. Install the instance in a safe environment, then register your agent from wherever it runs.
1
Step 1: Jentic One Host machine
# On the machine that will host your Jentic One instance:
curl -fsSL https://raw.githubusercontent.com/jentic/jentic-one/main/tools/install.sh | sh2
Step 2: Agent machine
# On the machine where your agent runs (keep this separate from the instance):
curl -fsSL https://raw.githubusercontent.com/jentic/jentic-one/main/tools/install.sh | sh
jentic register # connects your agent to your Jentic One instanceJentic One is in public beta. The setup above keeps your agent separate from the instance, which is what you want before using real credentials: an agent running as the same OS user as Jentic One can read its stored keys directly. Just evaluating? A single local install is fine to start. See the secure deployment guide for the tiers.
Capabilities
What an agent can do with Alegra API.
Create, list, update, and delete Alegra invoices and email them to a customer with /invoices/{id}/email
Manage the product and service items used as invoice line items
Maintain customer and supplier contact records via /contacts
Record payments against invoices and reconcile bank account activity
Generate and update estimates that can later be converted into invoices
Issue credit notes against existing invoices for refunds and adjustments
Use Cases
Patterns agents use Alegra API for, with concrete tasks.
★ Automated invoicing from a billing system
A SaaS billing system creates an invoice in Alegra each time a subscription renews by calling POST /invoices with the customer contact id, line items, and dates. The same workflow then calls POST /invoices/{id}/email to deliver the invoice straight to the customer. Bookkeeping stays in Alegra while the system of record stays in the SaaS app.
POST /invoices with the contact id and items array, then POST /invoices/{id}/email with the recipient address
Two-way contact sync between a CRM and Alegra
An ops engineer mirrors customers from a CRM into Alegra by listing /contacts, comparing against CRM records by email, and creating or updating contacts as needed. Keeping contact metadata aligned lets the accounting team produce invoices without re-entering names and tax IDs.
GET /contacts to list existing entries, then POST /contacts for missing CRM customers and PUT /contacts/{id} for changed records
Payment reconciliation and credit notes
An AR clerk reconciles incoming bank transfers against Alegra invoices by listing /payments and matching amounts to invoice ids. When a refund is required, the clerk issues a credit note via the credit notes resource, keeping the ledger consistent without manual journal entries.
GET /payments for the period, match each row to an invoice by amount and contact, and POST a credit note for any refunds
Agent-driven invoice lookup and dispatch
A Jentic agent answers requests like 'send the latest invoice to client X' by listing the contact, finding the most recent invoice, and emailing it via POST /invoices/{id}/email. The agent never sees the basic auth credentials and never has to compose Spanish-language email templates manually.
Search Jentic for 'create and email an Alegra invoice', execute POST /invoices for the contact, then chain POST /invoices/{id}/email with the recipient
Key Endpoints
33 endpoints — jentic publishes the only available openapi specification for alegra api, keeping it validated and agent-ready.
METHOD
PATH
DESCRIPTION
POST
/invoices
Create an invoice
GET
/invoices/{id}
Retrieve an invoice
POST
/invoices/{id}/email
Email an invoice to a contact
POST
/contacts
Create a contact
POST
/items
Create a product or service item
POST
/payments
Record a payment
POST
/estimates
Create an estimate
POST
/invoices
Create an invoice
GET
/invoices/{id}
Retrieve an invoice
POST
/invoices/{id}/email
Email an invoice to a contact
POST
/contacts
Create a contact
POST
/items
Create a product or service item
POST
/payments
Record a payment
POST
/estimates
Create an estimate
Why Jentic?
Three things that make agents converge on Jentic-routed access.
Credential isolation
Alegra basic auth credentials (account email plus API token) are stored encrypted in the Jentic credential vault. Jentic builds the Authorization header at execution time, so the raw token never appears in the agent's prompt.
Intent-based discovery
Agents search Jentic by intent (e.g. 'create an alegra invoice', 'record a payment'), and Jentic returns the matching Alegra operation with its input schema for direct execution.
Time to first call
Direct Alegra integration: 2-3 days for auth, invoice payload modelling, and reconciliation logic. Through Jentic: under an hour with search, load, and execute.
Related APIs
Alternatives and complements available in the Jentic catalogue.
Complementary
Stripe API
Pair with Alegra so Stripe handles card collection while Alegra produces the legal invoice
Use Stripe alongside Alegra when payment capture must happen in Stripe but the bookkeeping ledger lives in Alegra
FAQs
Specific to using Alegra API through Jentic.
Why is there no official OpenAPI spec for Alegra API?
Alegra does not publish an OpenAPI specification. Jentic generates and maintains this spec so that AI agents and developers can call Alegra API via structured tooling. It is validated against the live API and kept up to date. Get started at https://app.jentic.com/sign-up.
What authentication does the Alegra API use?
Alegra uses HTTP basic auth, where the username is the account email and the password is the API token from the Alegra account settings. Jentic stores both encrypted and injects the Authorization header at execution time so the credentials never enter the agent's prompt context.
Can I create and email an invoice with the Alegra API?
Yes. POST /invoices with the contact id, items, and dates to create the invoice, then POST /invoices/{id}/email with the recipient address to send it. The same id can be retrieved later with GET /invoices/{id} for audits.
What are the rate limits for the Alegra API?
The OpenAPI spec does not declare rate limits. Alegra enforces plan-based limits server-side (commonly a few requests per second per token), so batch high-volume invoice or contact sync jobs accordingly.
How do I record a payment against an invoice through Jentic?
Search Jentic for 'record an alegra payment', load the schema for POST /payments, and execute it with the invoice id, amount, and bank account id. Jentic returns the payment record so an agent can confirm reconciliation.
Can I issue a credit note for a refund using the Alegra API?
Yes. The credit notes resource lets you issue a credit against an existing invoice. The credit note keeps the ledger consistent without manual journal entries and is visible in the same Alegra account as the original invoice.
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