The Correos Express API, minus the integration work
Add the Correos Express API to your WMS, ERP, or e-commerce backend through one Sendcloud integration. Ship time-definite Spanish express across all six zones, alongside Correos and 170+ other carriers.
The Correos Express API, minus the integration work
Add the Correos Express API to your WMS, ERP, or e-commerce backend through one Sendcloud integration. Ship time-definite Spanish express across all six zones, alongside Correos and 170+ other carriers.
The Correos Express API, minus the integration work
Add the Correos Express API to your WMS, ERP, or e-commerce backend through one Sendcloud integration. Ship time-definite Spanish express across all six zones, alongside Correos and 170+ other carriers.
Free plan available
Works with your shop
Cancel anytime
Why integrate PostNL through the Sendcloud API?
Why integrate PostNL through the Sendcloud API?
Why integrate PostNL through the Sendcloud API?
Why integrate PostNL through the Sendcloud API?
Time-definite Spanish express, 6 zones
Ship under Sendcloud's negotiated PostNL rates from day one, or bring your own contract when you're ready.
6-zone shipping including Canary Islands
PostNL's evening windows and 4,500+ service points are available via Sendcloud's REST API, with no separate PostNL API credentials required.
Integrate with 170+ carriers at once
Stop maintaining and integrating different carrier and use one API for all.
GDPR Compliance
We comply with the GDPR rules to protect data and privacy in Europe.
API uptime of 99.99%
Reliable shipping software built on AWS and with top market technologies.
ISO 27001 Certified
The world’s most rigorous standards for information security.
Why integrate PostNL through the Sendcloud API?
Time-definite Spanish express, 6 zones
Ship under Sendcloud's negotiated PostNL rates from day one, or bring your own contract when you're ready.
6-zone shipping including Canary Islands
PostNL's evening windows and 4,500+ service points are available via Sendcloud's REST API, with no separate PostNL API credentials required.
Integrate with 170+ carriers at once
Stop maintaining and integrating different carrier and use one API for all.
GDPR Compliance
We comply with the GDPR rules to protect data and privacy in Europe.
API uptime of 99.99%
Reliable shipping software built on AWS and with top market technologies.
ISO 27001 Certified
The world’s most rigorous standards for information security.
Why integrate PostNL through the Sendcloud API?
Time-definite Spanish express, 6 zones
Ship under Sendcloud's negotiated PostNL rates from day one, or bring your own contract when you're ready.
6-zone shipping including Canary Islands
PostNL's evening windows and 4,500+ service points are available via Sendcloud's REST API, with no separate PostNL API credentials required.
Integrate with 170+ carriers at once
Stop maintaining and integrating different carrier and use one API for all.
GDPR Compliance
We comply with the GDPR rules to protect data and privacy in Europe.
API uptime of 99.99%
Reliable shipping software built on AWS and with top market technologies.
ISO 27001 Certified
The world’s most rigorous standards for information security.
The complete shipping API for any system
The complete shipping API for any system
The complete shipping API for any system
"Sendcloud allows us to connect to a lot of different carriers seamlessly."
Oscar Ziegler
Founder and CEO
-
Hive
"Sendcloud allows us to connect to a lot of different carriers seamlessly."
Oscar Ziegler
Founder and CEO
-
Hive
"Sendcloud allows us to connect to a lot of different carriers seamlessly."
Oscar Ziegler
Founder and CEO
-
Hive
API integration examples
API Integration
See a basic example of an API integration using Python.
Service Point Picker
See how to integrate the Service Point Picker into a custom application.
API integration examples
API Integration
See a basic example of an API integration using Python.
Service Point Picker
See how to integrate the Service Point Picker into a custom application.
API integration examples
API Integration
See a basic example of an API integration using Python.
Service Point Picker
See how to integrate the Service Point Picker into a custom application.
Instantly connect to 170+ couriers Get started now
Free plan available
Works with your shop
Cancel anytime
More than 2,600 five star reviews
Instantly connect to 170+ couriers Get started now
Free plan available
Works with your shop
Cancel anytime
More than 2,600 five star reviews
Where do you start?
Where do you start?
Where do you start?
Questions & answers
Why integrate the Correos Express API through Sendcloud instead of directly?
Direct Correos Express integration means managing webservice credentials with the username ending in _WS, a 5-character password (letters and numbers), client identifier, and Sender Code in the format I+client_number.
Through Sendcloud, you authenticate once with your Sendcloud API key and use a single REST schema for Correos Express alongside every other carrier in your account. A direct Correos Express contract is required either way; Sendcloud rates aren't offered for Correos Express.
What happens when Correos Express updates or breaks their API?
Correos Express periodically updates webservice authentication and zone-based rate structures. Direct integrators have to refresh credentials and update their zone-routing logic when Correos Express ships changes.
When you ship Correos Express through the Sendcloud REST API, the abstraction layer absorbs those changes. Sendcloud's engineering monitors Correos Express's documentation and adjusts the carrier connector internally. Your Sendcloud request schema stays the same.
Can I use my own Correos Express contract?
Yes, and you have to. Correos Express requires a direct contract; Sendcloud rates aren't offered. Contact your Sendcloud sales representative if you don't have a contract yet.
In Sendcloud, go to Shipping > Carriers > My Contracts, find Correos, and click Add Contract. Enter the Username (ends in _WS), Password (5 characters, letters and numbers), Client Identifier, and Sender Code (I + client number). A Lite, Growth, or Premium plan is required.
If you change Correos Express credentials, update them in Sendcloud too. See the Correos Express contract activation Help Center article.
Which Correos Express products are supported through the API?
Through Sendcloud, you can ship Correos Express's full domestic and Iberian product line. Multi-line international shipments support up to 3 different item types per international shipment.
Spanish shipping zones: ES Provincial, ES Regional, ES Peninsular (under 800 km between capitals), ES Peninsular+ (800 km or more), ES Canary, ES Canary - Other Islands. Cross-border to mainland Portugal is supported through Peninsular zone configurations.
The Sendcloud shipping-methods endpoint returns the up-to-date list of methods enabled on your account. See the Correos Express shipping conditions Help Center article.
Which Correos Express-specific features does the API expose?
Correos Express-specific features exposed through the integration:
6-zone Spanish shipping structure built into the rate engine (Provincial, Regional, Peninsular, Peninsular+, Canary, Canary - Other Islands)
Mailbox or neighbor delivery options when the recipient is unavailable
Peak-season behavior: only one delivery attempt; high-volume parcels may be deposited at a service point
3-item-type limit per international shipment
How do I track Correos Express parcels?
Correos Express tracking includes service-point hold events when peak-season conditions limit delivery to a single attempt. Mailbox and neighbor-delivery events flow through the standard webhook stream when the recipient is unavailable.
All events normalise to Sendcloud's status taxonomy through GET https://panel.sendcloud.sc/api/v2/tracking/{tracking_number}, with the chronological history under statuses and each event mapped to parent_status. Subscribe to the parcel-status-changed webhook for push updates. Reference: Tracking parcels.
How do I create Correos Express return labels?
Correos Express return method availability depends on your contract setup. Peak-season behavior applies to returns too: only one delivery attempt may be made, with high-volume returns deposited directly at a service point.
All return labels are created through Sendcloud's standalone v3 Returns API (synchronous or asynchronous; async is recommended for higher throughput). No outgoing parcel lookup or JWT tokens are required. Reference: Returns API overview.
How does Sendcloud's multi-carrier API compare to connecting carriers individually?
The Sendcloud REST API gives you access to 170+ carriers, including Correos Express, through one credential set, one schema, one webhook stream, and one error model. Connecting carriers individually means handling separate authentication, payload formats, and tracking systems for each, and redoing the work every time a carrier ships breaking changes upstream.
With Sendcloud, you ship Correos Express alongside Correos, SEUR, MRW, and DHL, or any other carrier in your account using the same code. Route shipments between carriers based on rules (weight, destination, service level, cost) without writing carrier-specific routing logic. Fall back to alternative carriers automatically if Correos Express's upstream system has issues.
Adding a new carrier later means adding it to your Sendcloud account, not building a new integration.
Questions & answers
Why integrate the Correos Express API through Sendcloud instead of directly?
Direct Correos Express integration means managing webservice credentials with the username ending in _WS, a 5-character password (letters and numbers), client identifier, and Sender Code in the format I+client_number.
Through Sendcloud, you authenticate once with your Sendcloud API key and use a single REST schema for Correos Express alongside every other carrier in your account. A direct Correos Express contract is required either way; Sendcloud rates aren't offered for Correos Express.
What happens when Correos Express updates or breaks their API?
Correos Express periodically updates webservice authentication and zone-based rate structures. Direct integrators have to refresh credentials and update their zone-routing logic when Correos Express ships changes.
When you ship Correos Express through the Sendcloud REST API, the abstraction layer absorbs those changes. Sendcloud's engineering monitors Correos Express's documentation and adjusts the carrier connector internally. Your Sendcloud request schema stays the same.
Can I use my own Correos Express contract?
Yes, and you have to. Correos Express requires a direct contract; Sendcloud rates aren't offered. Contact your Sendcloud sales representative if you don't have a contract yet.
In Sendcloud, go to Shipping > Carriers > My Contracts, find Correos, and click Add Contract. Enter the Username (ends in _WS), Password (5 characters, letters and numbers), Client Identifier, and Sender Code (I + client number). A Lite, Growth, or Premium plan is required.
If you change Correos Express credentials, update them in Sendcloud too. See the Correos Express contract activation Help Center article.
Which Correos Express products are supported through the API?
Through Sendcloud, you can ship Correos Express's full domestic and Iberian product line. Multi-line international shipments support up to 3 different item types per international shipment.
Spanish shipping zones: ES Provincial, ES Regional, ES Peninsular (under 800 km between capitals), ES Peninsular+ (800 km or more), ES Canary, ES Canary - Other Islands. Cross-border to mainland Portugal is supported through Peninsular zone configurations.
The Sendcloud shipping-methods endpoint returns the up-to-date list of methods enabled on your account. See the Correos Express shipping conditions Help Center article.
Which Correos Express-specific features does the API expose?
Correos Express-specific features exposed through the integration:
6-zone Spanish shipping structure built into the rate engine (Provincial, Regional, Peninsular, Peninsular+, Canary, Canary - Other Islands)
Mailbox or neighbor delivery options when the recipient is unavailable
Peak-season behavior: only one delivery attempt; high-volume parcels may be deposited at a service point
3-item-type limit per international shipment
How do I track Correos Express parcels?
Correos Express tracking includes service-point hold events when peak-season conditions limit delivery to a single attempt. Mailbox and neighbor-delivery events flow through the standard webhook stream when the recipient is unavailable.
All events normalise to Sendcloud's status taxonomy through GET https://panel.sendcloud.sc/api/v2/tracking/{tracking_number}, with the chronological history under statuses and each event mapped to parent_status. Subscribe to the parcel-status-changed webhook for push updates. Reference: Tracking parcels.
How do I create Correos Express return labels?
Correos Express return method availability depends on your contract setup. Peak-season behavior applies to returns too: only one delivery attempt may be made, with high-volume returns deposited directly at a service point.
All return labels are created through Sendcloud's standalone v3 Returns API (synchronous or asynchronous; async is recommended for higher throughput). No outgoing parcel lookup or JWT tokens are required. Reference: Returns API overview.
How does Sendcloud's multi-carrier API compare to connecting carriers individually?
The Sendcloud REST API gives you access to 170+ carriers, including Correos Express, through one credential set, one schema, one webhook stream, and one error model. Connecting carriers individually means handling separate authentication, payload formats, and tracking systems for each, and redoing the work every time a carrier ships breaking changes upstream.
With Sendcloud, you ship Correos Express alongside Correos, SEUR, MRW, and DHL, or any other carrier in your account using the same code. Route shipments between carriers based on rules (weight, destination, service level, cost) without writing carrier-specific routing logic. Fall back to alternative carriers automatically if Correos Express's upstream system has issues.
Adding a new carrier later means adding it to your Sendcloud account, not building a new integration.
Questions & answers
Why integrate the Correos Express API through Sendcloud instead of directly?
Direct Correos Express integration means managing webservice credentials with the username ending in _WS, a 5-character password (letters and numbers), client identifier, and Sender Code in the format I+client_number.
Through Sendcloud, you authenticate once with your Sendcloud API key and use a single REST schema for Correos Express alongside every other carrier in your account. A direct Correos Express contract is required either way; Sendcloud rates aren't offered for Correos Express.
What happens when Correos Express updates or breaks their API?
Correos Express periodically updates webservice authentication and zone-based rate structures. Direct integrators have to refresh credentials and update their zone-routing logic when Correos Express ships changes.
When you ship Correos Express through the Sendcloud REST API, the abstraction layer absorbs those changes. Sendcloud's engineering monitors Correos Express's documentation and adjusts the carrier connector internally. Your Sendcloud request schema stays the same.
Can I use my own Correos Express contract?
Yes, and you have to. Correos Express requires a direct contract; Sendcloud rates aren't offered. Contact your Sendcloud sales representative if you don't have a contract yet.
In Sendcloud, go to Shipping > Carriers > My Contracts, find Correos, and click Add Contract. Enter the Username (ends in _WS), Password (5 characters, letters and numbers), Client Identifier, and Sender Code (I + client number). A Lite, Growth, or Premium plan is required.
If you change Correos Express credentials, update them in Sendcloud too. See the Correos Express contract activation Help Center article.
Which Correos Express products are supported through the API?
Through Sendcloud, you can ship Correos Express's full domestic and Iberian product line. Multi-line international shipments support up to 3 different item types per international shipment.
Spanish shipping zones: ES Provincial, ES Regional, ES Peninsular (under 800 km between capitals), ES Peninsular+ (800 km or more), ES Canary, ES Canary - Other Islands. Cross-border to mainland Portugal is supported through Peninsular zone configurations.
The Sendcloud shipping-methods endpoint returns the up-to-date list of methods enabled on your account. See the Correos Express shipping conditions Help Center article.
Which Correos Express-specific features does the API expose?
Correos Express-specific features exposed through the integration:
6-zone Spanish shipping structure built into the rate engine (Provincial, Regional, Peninsular, Peninsular+, Canary, Canary - Other Islands)
Mailbox or neighbor delivery options when the recipient is unavailable
Peak-season behavior: only one delivery attempt; high-volume parcels may be deposited at a service point
3-item-type limit per international shipment
How do I track Correos Express parcels?
Correos Express tracking includes service-point hold events when peak-season conditions limit delivery to a single attempt. Mailbox and neighbor-delivery events flow through the standard webhook stream when the recipient is unavailable.
All events normalise to Sendcloud's status taxonomy through GET https://panel.sendcloud.sc/api/v2/tracking/{tracking_number}, with the chronological history under statuses and each event mapped to parent_status. Subscribe to the parcel-status-changed webhook for push updates. Reference: Tracking parcels.
How do I create Correos Express return labels?
Correos Express return method availability depends on your contract setup. Peak-season behavior applies to returns too: only one delivery attempt may be made, with high-volume returns deposited directly at a service point.
All return labels are created through Sendcloud's standalone v3 Returns API (synchronous or asynchronous; async is recommended for higher throughput). No outgoing parcel lookup or JWT tokens are required. Reference: Returns API overview.
How does Sendcloud's multi-carrier API compare to connecting carriers individually?
The Sendcloud REST API gives you access to 170+ carriers, including Correos Express, through one credential set, one schema, one webhook stream, and one error model. Connecting carriers individually means handling separate authentication, payload formats, and tracking systems for each, and redoing the work every time a carrier ships breaking changes upstream.
With Sendcloud, you ship Correos Express alongside Correos, SEUR, MRW, and DHL, or any other carrier in your account using the same code. Route shipments between carriers based on rules (weight, destination, service level, cost) without writing carrier-specific routing logic. Fall back to alternative carriers automatically if Correos Express's upstream system has issues.
Adding a new carrier later means adding it to your Sendcloud account, not building a new integration.
One API for all your shipping needs
No setup fees
Same-day integration
Ship with Europe’s top carriers
One API for all your shipping needs
No setup fees
Same-day integration
Ship with Europe’s top carriers
One API for all your shipping needs
No setup fees
Same-day integration
Ship with Europe’s top carriers
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VAT number: NL856613897B01
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© 2026 Sendcloud. All Rights Reserved
Chamber of Commerce: 66572959
VAT number: NL856613897B01
Product
© 2026 Sendcloud. All Rights Reserved
Chamber of Commerce: 66572959
VAT number: NL856613897B01