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

    • Zoho CRM - Client Portal - Hide Notes Related List

      Hi Community, I'm building a customer portal and I can't find a way to hide the notes related list. I don't want the client to see the notes I have about them. Is there a way to do this as it is no bin/trash icon when I hover over.

    • "Pivot Table" Conditional Formatting

      Team, I there a way to use conditional formatting a "Pivot Table"  report? Thanks, Arron Blue Pumpkin Hosting | Solutions Made Simple

    • How many clients can be added to Zoho Practice?

      How many clients can be added to Zoho Practice without having their zoho app?

    • Stage History

      when viewing a ticket , and you look at stage history tab (kanban view) and look at the stage duration column in days, it shows the current stage of the ticket as " current stage ". Should it not rather show the amount of days it has been in that current

    • Automating Ticket Responses Using Zoho Desk's AI Features

      We’re looking to set up an automation within Zoho Desk that can analyze incoming emails or tickets and automatically respond with relevant knowledge base articles based on the content of the request. Could you please guide us on how to configure this

    • Optimising CRM-Projects workflows to manage requests, using Forms as an intermediary

      Is it possible to create a workflow between three apps with traceability between them all? We send information from Zoho CRM Deals over to Zoho Projects for project management and execution. We have used a lookup of sorts to create tasks in the past,

    • Service locations are tied to contacts?

      Trying the system out. And what I discovered is that it seems that the whole logic of the app is, I'd say, backwards. There is a Customer - a company. The company has contact persons and service locations can be associated with different contact persons.

    • Enhancements to Zoho Map integration tasks

      Hello everyone, We're excited to announce enhancements to the Zoho Map integration tasks in Deluge, which will boost its performance. This post will walk you through the upcoming changes, explain why we're making them, and detail the steps you need to

    • Bug in Total Hour Calculation in Regularization for past dates

      There is a bug in Zoho People Regularization For example today is the date is 10 if I choose a previous Date like 9 and add the Check in and Check out time The total hours aren't calculated properly, in the example the check in time is 10:40 AM check

    • Narrative 12: Sandbox - Testing without the risk

      Behind the scenes of a successful ticketing system: BTS Series Narrative 12: Sandbox - Testing without the risk What is a sandbox environment? A sandbox environment is a virtual playground that allows you to test freely and experiment with various elements

    • Announcing new features in Trident for Mac (1.27.0)

      Hello everyone! Trident for macOS (v1.27.0) is here with new features and enhancements to improve scheduling and managing your calendar events. Let's take a quick look at them. Stay aligned across time zones. Both the scheduled and original time zones

    • Slow uploads of large files

      I'm wanting to use Workdrive for transferring large images and video (we're talking things from 100MB-5GB). I'm running solo on a 500MBit/sec fiber connection. I'm getting upload speeds to Workdrive of no more than about 1-3Mbytes/sec when going through

    • Migrate Your Notes from OneNote to Zoho Notebook Today

      Greetings Notebook Users, We’re excited to introduce a powerful new feature that lets you migrate your notes from Microsoft OneNote to Zoho Notebook—making your transition faster and more seamless than ever. ✨ What’s New One-click migration: Easily import

    • need to upload from airtable to google drive

      I have a zapier zap that automates between airtable and google drive. When a customer uploads a new file into airtable via a client portal interface, zapier uploads that file into a folder linked to that customer's project record. I need to replicate

    • Can't delete functions that are associated with deleted workflow rules

      We have a handful of functions that were once associated with a workflow rule, but the rule has been deleted. The function still thinks it is associated so I can't assign it to a new rule. It is starting to get really messy because we have a list of functions

    • Default Sorting on Related Lists

      Is it possible to set the default sorting options on the related lists. For example on the Contact Details view I have related lists for activities, emails, products cases, notes etc... currently: Activities 'created date' newest first Emails - 'created

    • Credit Management: #1 Credit You Owe vs Credits Owed to the Business

      Think about the last time you ordered food online. You might have paid in advance through your card, but you received a $20 refund because your order got delayed or cancelled. In most apps, refunds don't go into the bank account directly; instead, they're

    • Tip #46- Turn Every Session into an Insight with Zoho Assist survey report- 'Insider Insights'

      Delivering exceptional remote support isn’t just about resolving issues, it’s about understanding how both customers and technicians experience each session. That’s where Survey Report in Zoho Assist come in. You can configure and customize survey questions

    • CRM/Bookings integration edits Contact names

      Hi there, I've installed the extension that connects Zoho CRM and Zoho Bookings. When we get a new appointment from Bookings from an existing Contact, that Contact's record shows this: First Name was updated from asd to blank value Last Name was updated

    • Domain Change

      “Please update my Email-in domain from @biginmail.biginmail.in to @biginmail.zoho.com. Messages to the .in domain are bouncing.”

    • Webhooks Limit Exceeded

      Today, I received an error message saying, 'Total number of Webhook call exceeded', but when I look at Manage > Billing, it doesn't look like any of my invokeURL calls are being logged. Following the advice from this thread: https://help.zoho.com/portal/en/community/topic/webhooks-daily-limits-in-zoho-creator

    • Auto select option in CRM after Zoho Form merge

      Hi, I have a dropdown field in Zoho CRM that is filled with a Zoho Form. The data is filled but not automatically shown. After selecting the right value in the dropdown the information a second field is shown. So the question is; how can I make the dropdown

    • Bring your CRM data straight into your presentations in Zoho Show

      Let's say you are working on a presentation about your team's sales pipeline for an upcoming strategy meeting. All the information you need about clients and leads is in Zoho CRM, but you end up copying details from the CRM into your slides, adjusting

    • Improved RingCentral Integration

      We’d like to request an enhancement to the current RingCentral integration with Zoho. RingCentral now automatically generates call transcripts and AI-based call summaries (AI Notes) for each call, which are extremely helpful for support and sales teams.

    • Introducing New APIs in Zoho Contracts

      We are excited to announce the release of new APIs in Zoho Contracts to help you automate and manage every stage of your contract lifecycle more efficiently. Here’s a quick overview of what’s new: 1. Complete Contract Draft You can use this API to complete

    • Vimeo

      For me Vimeo is the most important video social channel for media and filmmakers. Would others agree and like it added to Zoho Social.

    • Delete a department or category

      How do I delete a Department? Also, how do I delete a Category? This is pretty basic stuff here and it's impossible to find.

    • Organization Emails in Email History

      How can I make received Org Emails to show up here?

    • How to setup pricing in Zoho

      Hi everyone, I am relatively new here and have just moved from my old inventory system to the Zoho one. I am trying to get my head around how it all works. I am mostly setup connected to a shopify store, but I do manual sales also For manual invoicing,

    • Prefilled Date fields auto-changed and then locked when using “Edit as new”

      If a document out for signature has date fields (not SignedDate fields) that were pre-filled before sending, and then you use “Edit as new” to create a new version of the same document, the value of those date fields gets automatically changed to today

    • Is there a way to update all the start and end dates of tasks of a project after a calendar change?

      Hi! Here's my situation. I've built a complete project planning. All its tasks have start dates and due dates. After completing the planning, I've realized that the project calendar was not the right one. So I changed the project calendar. I now have

    • Access Phone Field Components (Country Code) Directly

      Hello everyone, I'd like to propose an enhancement for the Phone field in Zoho Creator. The Problem: The Phone field captures the country code and local number separately, but stores them as a single string (e.g., +1234567890). To get the country code,

    • Send mass messages through WhatsApp from the Tickets module

      Hi Everyone! Effective communication is key to delivering prompt and reliable customer support. Because WhatsApp is one of the most widely used and familiar messaging platforms, it's an effective channel for agents to reach customers who have submitted

    • Lead Owner Signature Merge Field

      I want to automatically insert a signature (i.e. contact info usually found at the bottom of an email) into an email template, depending on who the lead owner is. What is the merge code for the Signature from a Users profile? CRM > Settings > Customization > Templates There is a popup near the bottom of the edit screen which says: "You can insert a Signature, which is available as a merge field in the users section." It is also referenced on this page: https://help.zoho.com/portal/en/kb/crm/customize-crm-account/customizing-templates/articles/template-builder#Merge_Fields

    • How do I create a time field?

      I want a field that only records time. I can only see how to create a date-time field. If I do that and enter a time, without a date, nothing is recorded. If I create a number or decimal field, I cannot use it in time calculations. All I want is a field

    • Alternating columns - How to reverse order on mobile - Responsive template

      Can the order of alternating columns be reversed on mobile so that image comes before the text? Example: Desktop Row 1 column Left (image) , column right (text) Row 2 column Left (text) , column right (image) Mobile Currently Row 1 Image over text Row

    • InvokeURL butchering JSON for OpenAI API calls

      My organization works with mostly educational institutions. We have a custom module called "Schools", which is the user-entered school name they put when using our service (which they enter along with their state and zip code). We want to map this to

    • Custom order for Current Stage (Blueprint field)

      Hi! I suggest adding the option to set a custom order in reports for the Blueprint field ‘Current Stage’. Currently, these fields can only be sorted in ascending or descending order. Thanks!

    • CRM E-mail Sync from Outlook

      We are exploring Zoho as a possible new solution for our company. We are trying to understand further on how e-mail sync works. We use outlook. Our current CRM logs anytime we e-mail a customer so we can see in the CRM the message sent to the customer.

    • Run your help desk on your schedule

      In business, time is of the essence. This is especially true in a function like customer service, where KPIs such as response time and agent availability are the measures of success. Perhaps the most crucial consideration one needs to make about time is your hours of operation. These set expectations for your customer and for employees. To make communicating this information easier, we've revamped the way business hours and holiday lists work in Zoho Desk.   In order to accommodate teams that work

    • Next Page