Rainbow
Rainbow — formerly Riverse, whose riverse.io domain now 301s to rainbowstandard.io — is a carbon crediting programme and registry that certifies and issues Rainbow Carbon Credits (RCCs) from engineered carbon removal and greenhouse-gas reduction projects across biochar, BiCRS/BioCCS, enhanced rock weathering, ex-situ mineralization, biogas from anaerobic digestion, biobased construction materials, battery second life and electronics refurbishment. The programme is ICVCM Core-Carbon-Principles approved, ICROA endorsed, approved as a Frontier credit issuer, and runs EU CRCF-compliant plus CORSIA and Paris Agreement Article 6 crediting tracks. It operates two platforms: Arc (arc.rainbowstandard.io), the project-developer certification and MRV platform launched October 2025, and the public Rainbow Registry (registry.rainbowstandard.io) where every project, credit block, serial number and retirement is published. Its public surface is a 163-page GitBook documentation hub of standard rules, procedures, methodologies, fees and governance policies, served with a real llms.txt and a Content-Signal AI-usage declaration. No OpenAPI, AsyncAPI, GraphQL SDL, SDK, MCP server or A2A agent card is served on any Rainbow host; the only public acknowledgement that an API exists at all is a single line in the published fee schedule confirming that API connections carry no additional cost.
Limited machine-readable signal and partial portal coverage — documentation a human can read, but little a machine or agent can consume without scraping.
API Evangelist profiles Rainbow the way a machine reads it — 5 machine-readable artifacts, pulled from the provider's own public surface and indexed so a developer, an analyst, or an AI agent can evaluate it against every other provider on the network.
Every provider in the network is reduced to the same set of machine-readable artifacts — OpenAPI contracts, event specifications, GraphQL schemas, runnable collections, pricing and rate-limit signals, security posture, OAuth scopes, and the agent surfaces (MCP servers and skills) that let software drive the API on its own. We profile them because the interface is the part of a company you can actually inspect: it is a truer signal of what a provider does than any marketing page. From those artifacts we compute the Kin Score — Rainbow scores 34.3/100 (thin), with a separate agent-readiness read of 5/100 (human only). The full breakdown is below, followed by every artifact we hold — each card links through to its machine-readable definition on apis.io.
Why this profile is thin
Rainbow's own published fee schedule confirms an API exists — "Rainbow does not charge additional costs for retirement, transfers or API connections" — but the connection is only available to Arc/Registry account holders and not one of the 163 public documentation pages describes an endpoint, base URL, auth model or spec.
An API exists — we simply could not reach the contract without credentials or a sales conversation. This one is Rainbow's to change: publishing the reference and a machine-readable spec at a public URL, while keeping key issuance behind whatever gate they like, would let an integrator evaluate the API before committing to a call.
What we probed
https://docs.rainbowstandard.io/other/terms-and-contracts/rainbow-standard-and-registry-fees.md→ HTTP 200https://docs.rainbowstandard.io/llms.txt→ HTTP 200https://arc.rainbowstandard.io/api/openapi.json→ HTTP 404https://registry.rainbowstandard.io/openapi.json→ HTTP 404https://api.rainbowstandard.io/→ HTTP 0
Kin Score
This is the API Evangelist rating — a single, repeatable read computed from the artifacts on this page. Green fill is points earned; the red track is points possible, so every bar shows earned-versus-possible at a glance. Every facet and dimension name is a link: it opens that measurement's page on APIs.io, where the rating runs across the whole catalog — the exact checks that feed it, how every profiled provider distributes on it, and who is at the top of it.
Kin Score
How this is scored →scored 2026-09-08 · rubric v0.20.0
Put this on your own site. The badge is drawn live from Rainbow's current Kin Score — paste it once and it updates itself every time the score is recomputed. It follows your visitor's light or dark setting, and it links back here so anyone who sees it can read the full breakdown.
<!-- Kin Score · API Evangelist -->
<a href="https://providers.apievangelist.com/providers/riverse/"
title="Rainbow on API Evangelist — API profile and Kin Score">
<img src="https://apis.io/badge/riverse.svg"
alt="Rainbow Kin Score — API readiness rating by API Evangelist" width="150" height="150" loading="lazy">
</a>[](https://providers.apievangelist.com/providers/riverse/)<!-- Kin Score · API Evangelist -->
<a href="https://providers.apievangelist.com/providers/riverse/"
title="Rainbow on API Evangelist — API profile and Kin Score">
<img src="https://apis.io/badge/riverse/card.svg"
alt="Rainbow Kin Score — API readiness rating by API Evangelist" width="340" height="120" loading="lazy">
</a>More shapes, themes and sizes → · Score as JSON · How badges work
How we profile Rainbow
Each block below is one kind of artifact we hold for Rainbow. For each we say what it is and why it earns a place in the profile, then list every one we've indexed — capped at two rows, scroll within the panel for the rest.
Pricing Plans 1
Pricing is part of the interface. Machine-readable plans tell you what a tier costs and includes before you commit — one of the things the Kin Score reads for access clarity — renamed from commercial clarity in rubric 0.12, because a free statutory interface has access terms and no commercial ones.
Published pricing tiers and plan structures.
Rate Limits 1
Rate limits are the difference between a demo that works and a production integration that doesn't fall over. Publishing them is an operational-transparency signal — and a hard requirement for any agent that plans its own throughput.
Documented rate limits and quota policies.
Riverse Rate Limits
RATE LIMITSSecurity Posture 3
Authentication, domain security, vulnerability disclosure, and trust-center signals — the evidence that a provider takes security seriously enough to document it. We profile it because you can't govern what you can't see.
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Resources
Every other property we hold for Rainbow — documentation, portals, status pages, policies, and corporate surface — grouped by the job it does, following the integrator's arc from getting started to running in production.
Get Started 2
Portal, sign-up, and the first successful call
Documentation 1
Reference material describing how the API behaves
Agent Surfaces 1
MCP servers, agent skills, and machine-readable catalogs
Design & Contract 3
Pagination, idempotency, versioning, errors, and events
Access & Security 6
Authentication, authorization, and security posture
Operate 4
Status, limits, changes, and where to get help
Commercial 4
Pricing, plans, and the legal terms of use
Company 2
The organization behind the API
Other 1
Properties that don't map to a standard resource type
← All providers · Data indexed from github.com/api-evangelist/riverse · machine-readable index on apis.io
This is an independent, third-party profile of Rainbow, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.
The Kin Score and Agent Readiness rating are independently calculated assessments of a company's public API artifacts, scored against a published rubric. They are not certifications, endorsements, security assessments, or audits.
Corrections, re-scores, and removal are free — no partnership or purchase required, and you do not need to justify the request. A removed company is recorded as unrated, never scored zero for having asked. Acknowledgement within one business day; removal within two.
info@apievangelist.com
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you will get a person, not a form — we will tell you exactly which public URLs this profile was built from.