Smile.io
Smile.io is a loyalty, rewards, and referrals platform for e-commerce brands (widely used on Shopify). Merchants run points programs, referral programs, and VIP tiers, and integrate them programmatically through the Smile.io REST API (base https://api.smile.io/v1). The REST API exposes customers and customer identities, points transactions and settings, points products and purchases, earning rules, rewards and reward fulfillments, VIP tiers, and custom activities. It uses resource-oriented URLs, returns JSON, and is authenticated with an HTTP Bearer token (a merchant API key or an app OAuth access token). REST API access is gated to the Plus and Enterprise plans.
Smile.io publishes 9 API contracts indexed on the APIs.io network, including Activities API, Customer Identities API, Customers API, and 6 more. Tagged areas include Loyalty, Rewards, Referrals, E-Commerce, and Points.
The Smile.io catalog on APIs.io includes 1 Spectral governance ruleset.
Smile.io’s developer surface includes authentication, documentation, and 9 more developer resources.
What this lets a business do 1
Business capabilities this provider's published APIs can perform, derived from its own contracts. Browse all capabilities →
Kin Score
Markets this provider is in provisional
The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.
| Market | Position | Depth | Registered MCP server | Declares compatibility |
|---|---|---|---|---|
| Reviews, Ratings and UGC (review platforms and who integrates with them) | builds-on | 51.7 | - | - |
| MACH & Headless Commerce | builds-on | 51.7 | - | - |
Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.
Standards implemented 1
Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.
APIs 9
Individual APIs this provider publishes, each with its own machine-readable definition.
Smile.io Activities API
Record custom customer activities that can earn points.
Smile.io Customer Identities API
Create or update a customer from an external system identity.
Smile.io Customers API
Loyalty program members and their point balances and state.
Smile.io Earning Rules API
Rules that define how customers earn points.
Smile.io Points Products API
Redeemable products a customer can purchase with points.
Smile.io Points Settings API
Program-level points configuration (currency name, ratios).
Smile.io Points Transactions API
Point balance changes - earn, redeem, adjust - for a customer.
Smile.io Reward Fulfillments API
Fulfillment records for rewards a customer has redeemed.
Smile.io VIP Tiers API
VIP program tiers and their thresholds and perks.
Scroll for all 9
Open Collections 10
Open, tool-agnostic API collections (OpenAPI-derived and Bruno).
Smile.io REST Activities API
OPEN COLLECTIONSmile.io REST Activities Customer Identities API
OPEN COLLECTIONSmile.io REST Activities Customers API
OPEN COLLECTIONSmile.io REST Activities Earning Rules API
OPEN COLLECTIONSmile.io REST Activities Points Products API
OPEN COLLECTIONSmile.io REST Activities Points Settings API
OPEN COLLECTIONSmile.io REST Activities Points Transactions API
OPEN COLLECTIONSmile.io REST Activities Reward Fulfillments API
OPEN COLLECTIONSmile.io REST Activities VIP Tiers API
OPEN COLLECTIONSmile.io REST API
OPEN COLLECTIONScroll for all 10
Smile.io API pricing
Not yet checked against Smile.io's own pricing page. Compiled by API Evangelist on 2026-07-10 from smile.io/pricing; confirm before you rely on a figure. A free plan or tier is listed.
| Plan | Price |
|---|---|
| Free free | Free |
| Essential paid | $15 per monthly Subscription / month |
| Standard paid | $79 per monthly Subscription / month |
| Growth paid | $199 per monthly Subscription / month |
| Plus paid | $999 per monthly Subscription / month |
| Enterprise enterprise | — |
Plan details, limits and sources →
Rate limits
- REST API Requests: 10 per second requests
- Enterprise Custom Rate Limits: negotiated requests
- Monthly Order Allowance: per plan orders
Compiled by API Evangelist, not yet checked against Smile.io's documentation. Rate-limit details →
Pricing Plans 1
Published pricing tiers and plan structures.
Rate Limits 1
Documented rate limits and quota policies.
Smile.io Rate Limits
RATE LIMITSFinOps 1
Cost, billing, and metering signals for API financial operations.
Smile.io Finops
FINOPSSpectral Rules 1
Spectral governance rulesets for linting and validating these APIs. Counts are the severity each rule declares, not results of running them.
Smile.io API Rules
SPECTRALSecurity Posture 2
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Agentic Access (API Evangelist recommendations) 1
Recommended x-agentic-access execution contracts for AI agents.
Resources
Documentation 1
Reference material describing how the API behaves
Agent Surfaces 1
MCP servers, agent skills, and machine-readable catalogs
Access & Security 2
Authentication, authorization, and security posture
Operate 1
Status, limits, changes, and where to get help
Commercial 2
Pricing, plans, and the legal terms of use
Company 3
The organization behind the API
Other 1
Properties that don't map to a standard resource type
Source (apis.yml)
Smile.io API — frequently asked questions
Does Smile.io have an API?
Yes. APIs.io lists 9 APIs from Smile.io, including Smile.io Activities API, Smile.io Customer Identities API and Smile.io Customers API, and 6 more.
Is there an OpenAPI specification for the Smile.io API?
Yes. APIs.io indexes 9 OpenAPI specifications for Smile.io, each linked for download from this page.
How do I authenticate with the Smile.io API?
Smile.io uses bearer-token authentication (http · 1 scheme). The details are profiled on APIs.io as Smile.io Authentication.
How much does the Smile.io API cost?
APIs.io lists 6 pricing plans for Smile.io, with each plan's price, limits and inclusions under Pricing on this page.
Is the Smile.io API ready for AI agents?
Smile.io has a Kin Score of 29.0 out of 100 (thin) and an Agent Readiness score of 22.1 (agent-aware), scored by API Evangelist on 2026-11-13.
Work with this as data
Every provider here is available over the APIs.io API and to AI agents over MCP.