Kaizen #203 - Answering Your Questions | Handling API Limits and Error Responses

Kaizen #203 - Answering Your Questions | Handling API Limits and Error Responses



Hi Everyone,
Welcome back to yet another post in the Kaizen Series! 
We appreciate your keen participation in the 200th milestone celebration of the Kaizen series. We will continue to answer the queries we received through the feedback. 
When working with Zoho CRM APIs, you must respect API limits, handle errors properly, and deliver meaningful experiences—even when things go wrong. In this post, we will discuss handling API limits and error responses.

Understanding Zoho CRM API Limits

Zoho CRM enforces API limits based on the purchased user licenses and add-on credits, and this is to ensure availability to all users and prevent abuse of its APIs. The following limits are applicable to Zoho CRM REST APIs.

  • API Credits Limits: Each edition (Free, Standard, Professional, etc.) comes with a set number of API credits per rolling 24-hour window. For example, Enterprise/Zoho One offers a baseline of 50,000 plus 1,000 per user license, with a cap up to 5,000,000 credits including add-one credits. You can refer to our help documentation on API limits for more details.
  • Concurrency Limits: Concurrency is the number of parallel API calls that are active at one time instance. Apps are capped at concurrent requests based on CRM edition: Free (5), Standard (10), Professional (15), Enterprise (20), Ultimate (25).
  • Sub-Concurrency Limits: Some resource-intensive APIs have their own concurrency limits (typically 10 concurrent requests): bulk updates, queries, lead conversion, mail, etc. Exceeding these returns a TOO_MANY_REQUESTS error.
  • Limits per Call: Different APIs have specific limits for the number of resources that can be inserted/updated. For example for insert, update, or upsert records, you can pass up to 100 records in one API call. Refer to the individual help documentation for any such limits.

Tips:

  • Monitor Usage: Use Zoho’s dashboard to track API credits in real time. Set alerts if you are approaching limits. Alternatively, keep an eye on the header X-API-CREDITS-REMAINING which denotes the remaining credits that will be present in the response when your API usage exceeds 50 percent or the daily available credit limit. Also, you can customize your usage notification to receive an email alert.
  • Batch Operations: Prefer bulk inserts/updates (up to 100 records/call) to reduce wasteful requests. Use composite APIs when multiple APIs need to be executed. 
  • Space Out Calls: When integrating, use logical intervals and avoid call bursts to prevent concurrency /subconcurrency limit getting applied. We have covered this in more detail in our previous Kaizen post : How to effectively handle API calls to optimize API credits?

Limits in Zoho CRM GraphQL APIs

Like our REST APIs, our GraphQL API calls also consume credits based on the type and number of resources queried. Maximum allowed credits per call is 10 credits.
Complexity for each query is calculated based on the type and number of resources requested, and maximum allowed complexity is 1,000 per query. 
Depth refers to the number of nesting layers of a field. Depth up to seven for metadata and three for records is allowed.
You can refer to our GraphQL API documentation on Credits, Complexity, and Depth for more details.

Handling Errors

 Zoho CRM REST APIs return 200 status codes for every successful API call. Each API error has these sections:
  • Status Code 
  • Error Code 
  • Message 
Different sections of an error response
Here "resource_path_index": 0 in the response indicates which segment of the URL path contains the error, counting after the API version.

Common Errors

  • 400 Bad Request:  
    • INVALID_MODULE
      • Cause: Incorrect module name (e.g., "Lead" vs "Leads").
      • Fix: Use exact API names from Setup > Developer Space > APIs.
    • INVALID_DATA
      • Cause: Malformed JSON/wrong data type.
      • Fix: Validate field formats.
    • DUPLICATE_DATA
      • Cause: Unique field value exists elsewhere.
      • Fix: Disable "Do not allow duplicates" or change value.
    • MANDATORY_NOT_FOUND
      • Cause: Missing required field (e.g., Last_Name in Contacts while trying to insert a new record in Contacts module).
      • Fix: Include all mandatory fields in the request.
  •  401 Unauthorized: 
    • AUTHENTICATION_FAILED
      • Cause: Wrong domain URL .
      • Fix: Use the correct domain-specific URL.
    • INVALID_TOKEN:
      • Cause: Expired OAuth token is used for making API call.
      • Fix: Refresh access token using the refresh token.
  • 403 Forbidden: 
    • NO_PERMISSION
      • Cause: User lacks permission for the resource.
      • Fix: Obtain necessary permission to access the resource.
  •  404 Not Found: 
    • INVALID_URL_PATTERN
      • Cause: URL syntax error.
      • Fix: Verify endpoint structure in API docs.
  •  429 Too Many Requests: 
    • TOO_MANY_REQUESTS
      • Cause: Number of API requests for the 24 hour period is exceeded or the concurrency/sub-concurrency limit of the user for the app is exceeded.
      • Fix: Make calls in accordance with the limits.
  • 207 Multi-Status: 
    • In some cases when the API is partially successful, 207 status code is returned.

Tips

  • Mandatory Fields: Provide all mandatory fields in the response body.
  • OAuth Issues: Ensure correct scopes.
  • Inspect Every Response Body: Parse responses even if the HTTP status code returned is 2XX. 
  • Validate Data Before Calling: Ensure your request matches the expected format. Clean data before submission to prevent 400-range errors (e.g., MANDATORY_NOT_FOUND, DUPLICATE_DATA).
  • Token Issues: Respond to INVALID_TOKEN with a token refresh workflow.

Error Status Code in GraphQL APIs 

Zoho CRM GraphQL APIs return errors in 200 and 400 status codes depending on error type. 200 HTTP status codes are returned in two cases. 
(a) Issue in the input when validated against the schema .
(b) Runtime errors due to credits, depth, and so on.

Refer to the Status Codes and Responses page in GraphQL for more information.
We hope you found this post useful. We will be back next week to answer another query we received.
Let us know if you have any questions in the comments or drop us an email at support@zohocrm.com.

    • Recent Topics

    • Dropbox to Workdrive

      Namaste, Trust you all are doing well. Wanted to check how this can be done with Zoho flow. I typically receive dropbox links from my clients. Is there a way where I can provide the link to Zoho flow and it downloads the files from dropbox link to a work

    • Deals by Stages Funnel not showing in correct order

      Using the Stage-Probability Mapping for the Deals module we have created a steps our deals will pass through, RFQ, Closed/Lost, Declined/No-Go, Pricing, Submitted, Negotiations, Won. However when I view the Deal By Stages Funnel it does not show in the

    • Confirmation prompt before a custom button action is triggered

      Have you ever created a custom button and just hoped that you/your users are prompted first to confirm the action? Well, Zoho knows this concept. For example, in blueprint, whenever we want to advance to the next state by clicking the transition, it is

    • How to create auto populate field based on custom module in Zoho CRM?

      Hello, i'm still new to Zoho CRM and work as administrator in my company. Currently, I'm configuring layout for Quotes Module. So, the idea is, I've created a read-only field in Quotes called "Spec". I want this field automatically filled with Specification

    • Rich Text For Notes in Zoho CRM

      Hello everyone, As you know, notes are essential for recording information and ensuring smooth communication across your records. With our latest update, you can now use Rich Text formatting to organize and structure your notes more efficiently. By using

    • Office 365 and CRM mail integration: permission required

      Has anyone run into this weird problem? My email server is Office 365. When I try to configure Zoho CRM to use this server, a Microsoft popup window opens requesting user and password. After entering that, I get a message in the Microsoft window saying

    • Deluge - Can't get phone number SalesIQ

      Hey folks, I’m building a custom plug for SalesIQ that’s supposed to register leads into Zoho CRM. The SalesIQ chat is being implemented on WhatsApp, and in my plug I’m using this line: mobile_clean = session.get("phone").get("value"); From what I understand,

    • Zoho Desk - Community

      As a regular user of Zoho Cares Community I would really love to see the publish date of articles. For example, when I look at Announcements, it would be very beneficial to see which ones were posted recently, over those which have just and a recent comment.

    • access to quartz for my customers

      Hi how can I have access to the application quartz you use for us to send you screen rocording, this feature would be immensely useful for our customers support https://quartz.zoho.com/

    • Issue with Inline Images in Email Reply via Zoho Desk API

      Hi, I am attempting to send inline images in an email reply using the Zoho Desk API, but the images are not being displayed inline for the recipient. I have followed this documentation: https://desk.zoho.com/DeskAPIDocument#Uploads https://desk.zoho.com/DeskAPIDocument#Threads#Threads_SendEmailReply

    • How to search a value stored in a subform?

      Hello, We store serial numbers in subforms but now we would like to be able to search the values to be able to easily find the record with the serial number. I saw that it's not possible to search such values through global search but is it possible to do it an other way? Thank you,

    • Field Dependency Not Working on Detail Page in Zoho Desk

      Hi Support Team, I’ve created field dependencies between two fields in Zoho Desk, and they are working correctly on the Create and Edit layouts. However, on the Detail page, the fields are not displaying according to the dependencies I’ve set — they appear

    • How do the keyword critera work?

      Hi, I'm working on automated assignment of tickets based on keywords. How does this feature work? Where does this criteria look for keywords - email address, subject, email body? Can you please clarify this as I want to avoid overlapping with criteria

    • Error: Unsupported content type: text/html;charset=UTF-8 after tryeing to get the token for n8n automation

      I am working on ZOHO Desk automation and need to get the ZOHO auth token for n8n I have created the app in ZOHO Desk API, got client id and client secret. Added all data required to get a token in n8n. After I sign in with my ZOHO credentials in ZOHO

    • Improving Collaboration Features in Zoho Portal

      Hello Zoho Community, I’ve recently started exploring Zoho services and I’m really impressed with the wide range of features. However, I feel there is still room for improvement in the collaboration area. For example, it would be really helpful if we

    • Automated Shopify Emails Not Being Delivered

      I have an ecommerce store with Shopify. I recently set up my email to be served through Zoho. Since doing this, customers are not receiving some of our automated emails from Shopify itself. Our initial email that confirms their purchase goes through but our Shipping Notification that is automatically sent out upon fulfillment is not going through. Sometimes we get a notice that it's been classified as spam, sometimes nothing. I can send/receive email via Outlook on my desktop and I can send/receive

    • Send a campaign to one recipient.

      Very often I speak to a customer and they say they didn't see my email (maybe it went in Junk, maybe they deleted it). Anyway, I just want to go into the Campaign and send it to one person. You already have a feature very close to this - when sending a Test. While developing a campaign, I can send tests to anyone. Why can't we have this AFTER  the campaign has been sent? I know, there's a caveat, and that's in the use of merge tags. Most of the time I only use FNAME, but maybe you could check if

    • Try FSM again for our business

      We already have our customers individual equipment in CRM with serial numbers, install dates, warranty length and importantly next service which is generally 2 years. a month before the service date is due we get get a report and send out service reminders.

    • Get Cliq Meetings in my O365 calendar

      Hi, we are currently evaluating to replace the Teams Messaging and Meetings with Cliq. We currently still have all our email and calendars in O365. What i want to achieve is, to create a (ZOHO) meeting from Cliq and have this meeting added to my Outlook/O365

    • Issue with Zoho Help Portal – Tickets Missing or Not Answered

      Hi, How are you? I think there may be an issue with the Zoho Help Portal. I opened a few tickets directly in the help portal a some time ago but never received any response I also opened ticket 148356451 by email. I did receive a reply to it, but the

    • DUNS & Bradstreet and Credit risk monitoring integration with Zoho books

      Small businesses not being paid by bigger clients and clients of all sizes is a huge problem. It will be nice if Zoho develops integration with DUNS & Bradstreet(D&B) and Credit risk monitoring integration with Zoho books. That have small businesses can

    • Zoho Forms - Form Rules based on attachment fields

      Many businesses use forms to collect documents and images from customers. In many cases, you may want to trigger a notification or other automation based on whether or not an attachment was added. I've noticed that attachment fields do not appear in Rules

    • Can't open draft email for editing

      Last night I started composing an email and I let it save in drafts. This morning I want to continue working on the email. It is in my Drafts folder but it will not open. The only option there is to delete it. This is not the first time it has happened. On previous occasions I have just deleted the draft and started afresh, but I really want this one back. Windows 10 with Pale Moon 28.10.0 browser.

    • Open filtered deals from campaign

      Do you think a feature like this would be feasible? Say you are seeing campaign "XYZ" in CRM. The campaign has a related list of deals. If you want to see the related deals in a deal view, you should navigate to the Deals module, open the campaign filter,

    • Change scheduling emails time

      When sending an individual email there is a great feature to schedule them to send later. I could only use the one time that is suggested. Is there a way to select another time? Regards, Glenn

    • Zoho CRM: how can I control which contacts to sync with Outlook?

      I was just playing around syncing contacts from Zoho to MS Outlook (MS365 account.) The problem is our firm has hundreds of thousands of contacts and I don't want to bury my contacts list in outlook. Any help with this is greatly appreciated.

    • How to overcome limitations in meetings

      As a company, one of our deliverables is a meeting between two other companies, where we act as facilitators. So, if we recorded this meeting  in Zoho CRM, it should be connected to 2 accounts, 2 contacts, and 1 campaign (a campaign, in our use, is the

    • Different MRP / Pricing for same product but different batches

      We often face the following situations where MRP of a particular product changes on every purchase and hence we have to charge the customer accordingly. This can't be solved by Batch tracking as of now so far as I understand Zoho. How do you manage it as of now? 

    • Add a 'Log a Call' link to three dot icon in Canvas

      Hi, There's a three dot element when creating a canvas called 'More'. I would like to modify this to add a link that says 'Log a Call' in order to quickly record the details of a cellphone call. I'd also like this to be a simple 'contact' selection and

    • Syncing Zoho Forms with Bigin - Embedding issue?

      Hello everyone, I created a Zoho Form for a page on my GoDaddy website to collect leads, which then transfers the data to Bigin. However, I'm facing an issue where it doesn't seem to work properly. I've integrated Zoho Forms with Bigin and tried embedding

    • Can not add fields to a Section

      I feel like I'm missing something obvious: I can add new Sections to my form but I can not add fields to the Sections. I've tried fields already on the form as well as dragging and dropping new fields into the Section but nothing will go into it. What

    • Record Logged in User while using CRM lookup field

      Is it possible, while using the Zoho CRM lookup field, to automatically use the user account logged into Zoho CRM in a hidden field? I was hoping to add employee accounts to my current plan. But would like a record on the Form submission of who submitted

    • Form Rules for Suburb Categories to alternate landing pages or Making a Fields Contents ALL CAPS

      I need to send differentform submissions to two to three different thank-you URLs (for Meta/Google pixels) depending on which suburb a user selects in a form. I have ~400 suburbs split into two categories (A and B, based on business value). Current challenges:

    • Collaps Notes

      There are times when long/large notes are added to a record i.e. Accounts or Deals etc. Currently, the full note is displayed in the notes related list section. It would be great if by default only 5 to 10 rows of the note are displayed when the note

    • Zoho Down

      I have a drop in my Zoho One services.

    • Runing RPA Agents on Headless Windows 11 Machines

      Has anyone tried this? Anything to be aware of regarding screen resolution?

    • Problem for EU users connecting Zoho CRM through Google Ads for Enhanced conversions

      Has anyone else experienced this problem when trying to connect Zoho CRM through Google Ads interface to setup enhanced conversions? Did you guys get it fixed somehow? The Problem: The current Google Ads integration is hardcoded to use Zoho's US authentication

    • Why am I getting event Pop-up Notification for events that have been cancelled?

      Why is Calendar Notification still popping up for events that have been cancelled or changed? Each time events are cancelled or changed, I have observed that I am still getting notifications for them. Below is a sample pop-up notification for one of the

    • Create a draft in reply to an email via Emails API

      Hi, I’d like to use the outgoing webhook to automatically create a draft reply to incoming mail. How can I use the Emails API to create a draft reply that is linked to an existing email thread? I couldn’t find the relevant method in the documentation.

    • India Tech Support

      Is there no phone tech support number for India? And no chat facility either?

    • Next Page