A retail carbon credit exchange has disappeared from the internet without a single press release, industry article, or founder post explaining what happened. Xeptagon’s exchange, a Sri Lanka-based platform that listed carbon credits for retail buyers, went dark sometime between April and August 2026. Its domain no longer responds from datacenter networks, and from some residential connections it redirects to a completely different marketplace, Climate Impact X in Singapore. We know the timeline because CarbonMeld indexed the exchange: 18 listings, scraped monthly, with an average transparency score of 1.33 out of 10. This is what happened to Xeptagon’s exchange, documented date by date, and what it tells buyers about due diligence on carbon marketplaces.
A Disappearance With Dates, Not an Announcement
As of 21 August 2026, exchange.xeptagon.com does not answer TCP connections on port 443 from datacenter probes, even though its DNS record still resolves to an AWS address, 52.205.136.30. From residential IP addresses in Italy, the same domain redirects to climateimpactx.com, the exchange backed by DBS, SGX, Standard Chartered, and Temasek. There is no public evidence of a formal partnership or acquisition linking Xeptagon to Climate Impact X, so the redirect is, for now, unexplained.
The Internet Archive’s Wayback Machine holds regular snapshots of the exchange starting from October 2024. The last snapshot showing a live site, an HTTP 200 response, is dated 14 February 2026. Because the exchange was a single-page JavaScript application, the archive preserved only the application shell, not its textual content or listings.
CarbonMeld’s own crawl data narrows the window further. Our last successful scrape of the exchange ran on 8 April 2026 and returned 18 listings with prices and working buy links. Combined with the current state of the domain, that puts the exchange’s death between April and August 2026. Google still indexes pages of the dead exchange, including its sign-up page; clicking those results today lands on the Climate Impact X redirect.
No trade publication covered the shutdown. Xeptagon’s own corporate blog, which actively promotes the company’s B2B contracts, carries no note about the exchange at all. The last public trace of the platform was a closed-door pilot presented at Hong Kong FinTech Week in November 2025.
What Our Data Shows: 18 Listings, an Average Score of 1.33 Out of 10
Because we indexed the exchange while it was alive, we can quantify something no post-mortem normally can: how opaque the platform was while it operated. Across all 18 listings, the average CarbonMeld transparency score was 1.33 out of 10, with a minimum of 0.9 and a maximum of 1.6.
The reason for those scores is consistent across every listing. Zero registry identifiers were exposed, zero links pointed to actual registries, and zero downloadable documents were available anywhere on the exchange. The registry URL field was empty on 18 out of 18 listings.
Here is the part that matters most, and the reason we are not publishing the full listing table: many of the underlying projects are real and well documented on UNFCCC registries. The Olkaria IV geothermal project in Kenya, for example, is a thoroughly documented CDM project. So are the Ngong Hills wind and Kiambere hydro projects. On Xeptagon’s exchange, those same projects appeared as cards without a VCS or CDM registry code and without a single PDF. A low score here measures the opacity of the platform, not the quality of the projects underneath. That distinction is exactly why CarbonMeld penalizes listings that carry no verifiable evidence.
The Pattern: Retail Carbon Exchanges Die Quietly
Xeptagon, headquartered in Colombo, Sri Lanka, has visibly pivoted toward B2B and government infrastructure work. Its own blog documents a contract for Sri Lanka’s national carbon market registry with UNDP, the KIUDA exchange in South Korea built with SK Securities, and a Cyberport grant in Hong Kong. None of that activity mentions the retail exchange.
This fits a broader pattern in the voluntary carbon market. Retail-facing exchanges are expensive to run, depend on transaction volume that never fully materialized, and tend to shut down silently when the operator’s attention moves elsewhere. An exchange that disappears without notice leaves buyers with no record of what was listed, at what price, and under which claims, unless someone was archiving it independently.
We want to be precise about what we are not saying. There are no public signals of fraud or of user funds at risk, and we found no evidence that Climate Impact X acquired or absorbed Xeptagon’s exchange. The redirect could be a commercial arrangement, a domain handover, or something else entirely. What is documented is a silent disappearance and an unexplained redirect, and that alone is worth a buyer’s attention.
What This Changes for Buyers
The lesson is not about one exchange. It is that platform due diligence belongs alongside project due diligence. A buyer who verified Olkaria IV on the UNFCCC registry but purchased through a platform with no registry codes, no documents, and no audit trail was still exposed to platform risk, because the platform itself can vanish between two monthly scrapes.
Three checks would have flagged Xeptagon’s exchange before it disappeared. First, whether listings carry verifiable registry identifiers that resolve on the issuing registry. Second, whether project documents are downloadable and current. Third, whether the marketplace discloses its legal entity, custody arrangements, and an exit or wind-down policy. A platform that fails all three is not a counterparty; it is a brochure.
Why You Won’t See Xeptagon Exchange on CarbonMeld Anymore
Transparency is a feature, not a footnote, so here is exactly what we did. Because the domain is dead, we have deactivated Xeptagon Exchange as a data source on CarbonMeld. Its 18 listings have been marked as unavailable, and the marketplace has been removed from our marketplace filters, so it will no longer appear in searches or comparisons.
The individual project pages remain online with their scores and the rationale behind them. Those scores documented platform opacity while the exchange was live, and they remain a matter of record now that it is gone. When a marketplace we index disappears, we would rather tell you what we saw, when we saw it, and what we did about it than quietly delete the rows. That is what this article is.
