can you post the json you are trying to send?
Here is my code, thanks a lot
{
"trainings": [
{
"date": "2025-09-30",
"name": "Run - VMA courte",
"steps": [
{"duration": "15m", "zone": "Z1", "description": "Échauffement"},
{"duration": "30s", "zone": "Z5", "description": "VMA 1"},
{"duration": "1m", "zone": "Z1", "description": "Récup"},
{"duration": "30s", "zone": "Z5", "description": "VMA 2"},
{"duration": "1m", "zone": "Z1", "description": "Récup"},
{"repeat": 8,
"steps": [
{"duration": "30s", "zone": "Z5", "description": "VMA effort"},
{"duration": "1m", "zone": "Z1", "description": "Récup"}
]
},
{"duration": "10m", "zone": "Z1", "description": "Retour au calme"}
]
},
{
"date": "2025-10-02",
"name": "Run - Seuil",
"steps": [
{"duration": "15m", "zone": "Z1", "description": "Échauffement"},
{"duration": "8m", "zone": "Z3", "description": "Seuil 1"},
{"duration": "3m", "zone": "Z1", "description": "Récup"},
{"duration": "8m", "zone": "Z3", "description": "Seuil 2"},
{"duration": "3m", "zone": "Z1", "description": "Récup"},
{"duration": "8m", "zone": "Z3", "description": "Seuil 3"},
{"duration": "10m", "zone": "Z1", "description": "Retour au calme"}
]
},
{
"date": "2025-10-04",
"name": "Run - Sortie longue",
"steps": [
{"duration": "10m", "zone": "Z1", "description": "Échauffement"},
{"duration": "80m", "zone": "Z2", "description": "Endurance"},
{"duration": "10m", "zone": "Z1", "description": "Retour au calme"}
]
},
{
"date": "2025-10-01",
"name": "Bike - Endurance",
"steps": [
{"duration": "10m", "zone": "Z1", "description": "Échauffement"},
{"duration": "70m", "zone": "Z2", "description": "Endurance vélo"},
{"duration": "10m", "zone": "Z1", "description": "Retour au calme"}
]
},
{
"date": "2025-10-05",
"name": "Bike - Sortie Club",
"steps": [
{"duration": "240m", "zone": "Z2", "description": "Sortie longue 100km avec D+"}
]
},
{
"date": "2025-10-03",
"name": "Swim - Endurance technique",
"steps": [
{"duration": "10m", "zone": "Z1 HR", "description": "Échauffement crawl facile"},
{"duration": "20m", "zone": "Z2 HR", "description": "Endurance continue"},
{"duration": "10m", "zone": "Z1 HR", "description": "Retour au calme + éducatifs"}
]
}
]
}
It that’s pasted verbatim, then you need to change the “smart” double quotes (i.e “ and ”) for regular ones (" ").
So it would begin with
{
"trainings": [
{
"date":"2025-09-30",
For future reference, there are various places & tools you can use to validate the JSON and tell you where errors in the syntax are. JSON Online Validator and Formatter - JSON Lint is one.
1 Like
I think these double quotes were correct. Instead the forum software changed them, when using blockquote instead of code quotes.
There is a similar problem with json workouts
The json looks valid, so maybe @david can have a look of his interpreter what’s wrong.
2 Likes
Actually, what url are you using?
Yes, that’s it, you’re right
Sorry, i meant the intervals.icu url that you’re trying to call.
see here
- don’t unse “trainings”
- date should be “start_date_local” in a format like this “2025-03-04T09:00:00”
- you need the “category” and “type”
- instead of “steps[ ]” I would use the description field. You can probably use the “steps” json but I couldn’t find the documentation with a quick look to fix your code
the first 2 workouts corrected are like this
[
{
"start_date_local": "2025-09-30T09:00:00",
"name": "Run - VMA courte",
"category": "WORKOUT",
"type": "Run",
"description": "- Échauffement 15m Z1 Pace\n- VMA 1 30s Z5 Pace\n- Récup 1m Z1 Pace\n- VMA 2 30s Z5 Pace\n- Récup 1m Z1 Pace\n\n8x\n- VMA 1 30s Z5 Pace\n- Récup 1m Z1 Pace\n\n-Retour au calme 10m Z1 Pace"
}
,
{
"start_date_local": "2025-10-02T09:00:00",
"name": "Run - Seuil",
"category": "WORKOUT",
"type": "Run",
"description" : "- Échauffement 15m Z1 Pace\n- Seuil 1 8m Z3 Pace\n- Récoup 3m Z1 Pace\n- Seuil 2 8m Z3 Pace\n- Récoup 3m Z1 Pace\n- Seuil 3 8m Z3 Pace\n- Récoup 3m Z1 Pace\n- Retour au calme 10m Z1 Pace"
}
]
2 Likes
In ChatGPT do the prompt “Make zwo file” and then import it into intervals
I used your ChatGPT agent just now to create a Workout Text for a sample EZ recovery job and this worked out well 
Initially it created me using % CP but I use Stryd and Garmin, so I had to tell him to use % FTP and it worked. However on Garmin when I display the workout on my watch from training calendar, I don’t see the typical details like I would with Stryd Workouts - I only see the splits, duration and the description is always “Power 3s”. Is there a fix for that, or a different way to enter the Workout Text in Intervals?