{"uid":"cap_EIJY-uUIuCcFjP6qhmNUd","slug":"web-mercator-to-wgs84-inverse-projection-d04b6309","name":"Web Mercator to WGS84 Inverse Projection","description":"Un-project Web Mercator (EPSG:3857) easting/northing in metres back to WGS84 longitude/latitude in degrees.","url":"https://geospatial.openverbs.com/v1/inverse","method":"POST","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method","bodyType","body"],"properties":{"body":{"type":"object","required":["x","y"],"properties":{"x":{"type":"number","description":"Easting in metres (±20037508.34)."},"y":{"type":"number","description":"Northing in metres (±20037508.34)."}},"additionalProperties":false},"type":{"type":"string","const":"http"},"method":{"enum":["POST"],"type":"string"},"bodyType":{"enum":["json","form-data","text"],"type":"string"}},"additionalProperties":false}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.002","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.002/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_xe0AxAScd5t2v9W7FIbQl","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.002","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Converts Web Mercator (EPSG:3857) easting/northing coordinates in metres back to WGS84 longitude/latitude in decimal degrees.","exampleAgentPrompt":"Convert Web Mercator coordinates x=1113194.91 metres, y=6274861.39 metres back to WGS84 longitude and latitude in decimal degrees.","exampleUseCases":[{"title":"Decode tile server click coordinates","prompt":"A user clicked on my web map at Web Mercator coordinates x=2226389.82, y=4865942.28 — can you convert those back to longitude and latitude so I can look up what's at that location?"},{"title":"Recover geographic point from GIS database","prompt":"Our database stores geometries in EPSG:3857 and I have a point at x=-8235939.40, y=4970241.32 metres — please convert that to WGS84 decimal lat/lon."},{"title":"Reverse-engineer map feature location","prompt":"I pulled coordinates from a Web Mercator layer: easting 13149614.85, northing 3503549.84 — what are the WGS84 longitude and latitude for that point?"}],"resultDescription":"Returns the WGS84 longitude and latitude in decimal degrees corresponding to the input Web Mercator easting (x) and northing (y) in metres, effectively reversing the EPSG:3857 projection.","failureModes":["x or y value outside valid range (±20037508.34 metres) returns a validation error","missing required x or y body fields returns a 400-level error","non-numeric values for x or y cause schema validation failure","payment not provided or insufficient USDC results in 402 Payment Required"],"whenToPreferThis":"Choose this endpoint when you have coordinates already expressed in Web Mercator (EPSG:3857) metres — common output from tile servers, GIS databases, and web mapping libraries — and need to recover human-readable WGS84 decimal degrees. Prefer this over UTM or MGRS converters when the source data is specifically in EPSG:3857 projected metres.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T00:48:55.155Z","isFirstParty":false}